Different response validating the same page on web version and java jar version

validator_nu_http_response.json

{
  "url": "http://validationhell.com",
  "messages": [{
    "type": "info",
    "message": "The Content-Type was “text/html”. Using the HTML parser."
  }, {
    "type": "info",
    "message": "Using the schema for HTML5 + SVG 1.1 + MathML 3.0 + RDFa Lite 1.1."
  }, {
    "type": "error",
    "lastLine": 56,
    "firstLine": 55,
    "lastColumn": 64,
    "firstColumn": 37,
    "message": "The “align” attribute on the “img” element is obsolete. Use CSS instead.",
    "extract": " href=\"/\"><img\n src=\"/images/fire.png\" align=\"absmiddle\" width=\"30\" hspace=\"5\"><stron",
    "hiliteStart": 10,
    "hiliteLength": 69
  }, {
    "type": "error",
    "lastLine": 56,
    "firstLine": 55,
    "lastColumn": 64,
    "firstColumn": 37,
    "message": "The “hspace” attribute on the “img” element is obsolete. Use CSS instead.",
    "extract": " href=\"/\"><img\n src=\"/images/fire.png\" align=\"absmiddle\" width=\"30\" hspace=\"5\"><stron",
    "hiliteStart": 10,
    "hiliteLength": 69
  }, {
    "type": "error",
    "lastLine": 56,
    "firstLine": 55,
    "lastColumn": 64,
    "firstColumn": 37,
    "message": "An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.",
    "extract": " href=\"/\"><img\n src=\"/images/fire.png\" align=\"absmiddle\" width=\"30\" hspace=\"5\"><stron",
    "hiliteStart": 10,
    "hiliteLength": 69
  }, {
    "type": "error",
    "lastLine": 73,
    "lastColumn": 67,
    "firstColumn": 64,
    "message": "Stray end tag “a”.",
    "extract": "idates</a></a></li>\n",
    "hiliteStart": 10,
    "hiliteLength": 4
  }, {
    "type": "error",
    "lastLine": 83,
    "lastColumn": 66,
    "firstColumn": 62,
    "message": "End tag “li” seen, but there were open elements.",
    "extract": "e Abyss...</li>\n     ",
    "hiliteStart": 10,
    "hiliteLength": 5
  }, {
    "type": "error",
    "lastLine": 83,
    "lastColumn": 43,
    "firstColumn": 19,
    "message": "Unclosed element “a”.",
    "extract": "      <li><a href=\"/pages/abyss/1\">Enter ",
    "hiliteStart": 10,
    "hiliteLength": 25
  }, {
    "type": "error",
    "lastLine": 84,
    "firstLine": 83,
    "lastColumn": 12,
    "firstColumn": 67,
    "message": "Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)",
    "extract": "ss...</li>\n            </ul>\n",
    "hiliteStart": 10,
    "hiliteLength": 13
  }, {
    "type": "error",
    "lastLine": 84,
    "lastColumn": 17,
    "firstColumn": 13,
    "message": "End tag “ul” seen, but there were open elements.",
    "extract": "          </ul>\n\n    ",
    "hiliteStart": 10,
    "hiliteLength": 5
  }, {
    "type": "error",
    "lastLine": 87,
    "lastColumn": 161,
    "firstColumn": 15,
    "message": "Start tag “a” seen but an element of the same type was already open.",
    "extract": "          <a href=\"https://twitter.com/share\" class=\"twitter-share-button\" data-url=\"http://validationhell.com\" data-via=\"SiteValidator\" data-hashtags=\"w3c\">Tweet<",
    "hiliteStart": 10,
    "hiliteLength": 147
  }, {
    "type": "error",
    "lastLine": 87,
    "lastColumn": 161,
    "firstColumn": 15,
    "message": "End tag “a” violates nesting rules.",
    "extract": "          <a href=\"https://twitter.com/share\" class=\"twitter-share-button\" data-url=\"http://validationhell.com\" data-via=\"SiteValidator\" data-hashtags=\"w3c\">Tweet<",
    "hiliteStart": 10,
    "hiliteLength": 147
  }, {
    "type": "error",
    "lastLine": 87,
    "lastColumn": 161,
    "firstColumn": 15,
    "subType": "fatal",
    "message": "Cannot recover after last error. Any further errors will be ignored.",
    "extract": "          <a href=\"https://twitter.com/share\" class=\"twitter-share-button\" data-url=\"http://validationhell.com\" data-via=\"SiteValidator\" data-hashtags=\"w3c\">Tweet<",
    "hiliteStart": 10,
    "hiliteLength": 147
  }]
}

validator_nu_java_response.json

{
    "messages": [
        {
            "type": "info",
            "url": "http://validationhell.com",
            "lastLine": 1,
            "lastColumn": 109,
            "subType": "warning",
            "message": "Obsolete doctype. Expected “<!DOCTYPE html>”."
        },
        {
            "type": "error",
            "url": "http://validationhell.com",
            "lastLine": 56,
            "lastColumn": 64,
            "message": "The “align” attribute on the “img” element is obsolete. Use CSS instead."
        },
        {
            "type": "error",
            "url": "http://validationhell.com",
            "lastLine": 56,
            "lastColumn": 64,
            "message": "The “hspace” attribute on the “img” element is obsolete. Use CSS instead."
        },
        {
            "type": "error",
            "url": "http://validationhell.com",
            "lastLine": 56,
            "lastColumn": 64,
            "message": "An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images."
        },
        {
            "type": "error",
            "url": "http://validationhell.com",
            "lastLine": 73,
            "lastColumn": 67,
            "message": "Stray end tag “a”."
        },
        {
            "type": "error",
            "url": "http://validationhell.com",
            "lastLine": 83,
            "lastColumn": 66,
            "message": "End tag “li” seen, but there were open elements."
        },
        {
            "type": "error",
            "url": "http://validationhell.com",
            "lastLine": 83,
            "lastColumn": 43,
            "message": "Unclosed element “a”."
        },
        {
            "type": "error",
            "url": "http://validationhell.com",
            "lastLine": 84,
            "lastColumn": 12,
            "message": "Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)"
        },
        {
            "type": "error",
            "url": "http://validationhell.com",
            "lastLine": 84,
            "lastColumn": 17,
            "message": "End tag “ul” seen, but there were open elements."
        },
        {
            "type": "error",
            "url": "http://validationhell.com",
            "lastLine": 87,
            "lastColumn": 161,
            "message": "Start tag “a” seen but an element of the same type was already open."
        },
        {
            "type": "error",
            "url": "http://validationhell.com",
            "lastLine": 87,
            "lastColumn": 161,
            "message": "End tag “a” violates nesting rules."
        },
        {
            "type": "error",
            "url": "http://validationhell.com",
            "lastLine": 87,
            "lastColumn": 161,
            "subType": "fatal",
            "message": "Cannot recover after last error. Any further errors will be ignored."
        }
    ]
}