Test Sax. The `text` event is called two times. Why?

sax-test.js

var sax = require('sax'),
   fs = require('fs');

var strict = true;
var tag;
// Stream usage
// takes the same options as the parser
var saxStream = require("sax").createStream(strict)
saxStream.on("error", function (err) {
  // unhandled errors will throw, since this is a proper node
  // event emitter.
  console.error("error", err)
  // clear the error
  this._parser.error = null;
  this._parser.resume();
})
saxStream.on("opentag", function (node) {
  tag = node.name;
})

saxStream.on("text", function (text) {
  console.log(tag + ':' + text);
})

saxStream.on("end", function (node) {
  console.log('end'); 
})
// pipe is supported, and it's readable/writable
// same chunks coming in also go out.
var XMLStream = fs.createReadStream( __dirname + "/test-pt.xml");
XMLStream.pipe(saxStream);
console.log('start'); 

test-pt.xml

<?xml version="1.0" encoding="utf-8" ?>
<products>
	<product>
		<lastUpdated>03/10/2011 17:34:57</lastUpdated>
		<title>Titanium Gents Cubic Zirconia Earrings - Set of 2</title>
		<sku>2126119</sku>
		<ean></ean>
		<url>http://www.jdoqocy.com/click-4187113-10697412?URL=http%3A%2F%2Fwww.argos.co.uk%2Fstatic%2FProduct%2FpartNumber%2F2126119%2Fc_1%2F1%7Ccategory_root%7CJewellery%2Band%2Bwatches%7C14416987%2Fc_2%2F2%7C14416987%7CEarrings%7C14417016.htm</url>
		<imageUrl>http://www.argos.co.uk/wcsstore/argos/images/6-2126119MMA72UC589246M.jpg</imageUrl>
		<price>12.99</price>
		<priceWas></priceWas>
		<priceValidUntil>20/01/2012</priceValidUntil>
		<deliveryCost>5.95</deliveryCost>
		<deliveryAvailable>yes</deliveryAvailable>
		<deliveryDetails>Home delivery within 2 days</deliveryDetails>
		<storePickupAvailable>yes</storePickupAvailable>
		<storePickupDetails>Reserve it now</storePickupDetails>
		<moneyBackExclusion>yes</moneyBackExclusion>
		<buyingGuideName></buyingGuideName>
		<buyingGuideUrl></buyingGuideUrl>
		<creditOffer>no</creditOffer>
		<new>no</new>
		<internetOnly>no</internetOnly>
		<brand></brand>
		<colour></colour>
		<style></style>
		<collection></collection>
		<description_product>2 individual for the fashion conscious male. Set of 2 individual earrings; Titanium; Cubic zirconia set; Maximum size in set 15mm.</description_product>
		<keywords>Titanium, Gents, Cubic, Zirconia, Earrings, Set, Jewellery &amp; Watches, Men&apos;s jewellery, 2126119</keywords>
		<overallCustomerRating>5</overallCustomerRating>
		<numberOfReviews>2</numberOfReviews>
		<currency>GBP</currency>
		<categoryList>Jewellery &amp; Watches &gt; Men&apos;s jewellery; Jewellery &amp; Watches &gt; Earrings</categoryList>
		<categories>
			<category>
				<category_department>Jewellery &amp; Watches</category_department>
				<category_section>Men&apos;s jewellery</category_section>
				<name></name>
			</category>
			<category>
				<category_department>Jewellery &amp; Watches</category_department>
				<category_section>Earrings</category_section>
				<name></name>
			</category>
		</categories>
		<features>
		</features>
		<extras>
		</extras>
		<offers>
		</offers>
		<accessories>
		</accessories>
		<alternatives>
		</alternatives>
	</product>
</products>