In the jenkins configuration /var/lib/jenkins/config.xml, in the dashboard views, you must pass the jobs in alphabetical order. But if you manipulate the file externally and you alter the jobs list, the jobs that are not in alphabetical order won't appear in the view. This script reorders them.

fix-dashboard-config.py

#!/usr/bin/python
# This script will re-order the scripts the the jenkins dashboard views
# If the jobs are sorted alphabetically, all the jobs do not appear
# inside the view.
# This script fixes this issues.
# USAGE: fix-dashboard-config.py /var/lib/jenkins/config.xml
import sys
try:
    from lxml import etree
except ImportError:
    sys.stderr.write("You need lxml to use this script\n")
    exit(4)


if __name__ == '__main__':
    try:
        filename = sys.argv[1]
    except IndexError:
        sys.stderr.write("You must pass the Jenkins configuration file as argument\n")
        exit(1)

    try:
        doc = etree.parse(filename)
    except IOError:
        sys.stderr.write("error accessing the configuration file\n")
        exit(2)

    for parent in doc.xpath('//hudson/views/hudson.plugins.view.dashboard.Dashboard/jobNames'): # Search for parent elements
        children = parent.getchildren()
        sorted_children = sorted(children,key=lambda x: x.text)
        parent.clear()
        for child in sorted_children:
            parent.append(child)

    try:
        doc.write(filename)
    except IOError:
        sys.stderr.write("error writing the configuration file\n")
        exit(3)