commit 911781af9cc06e27c0a8580f07f7673c90e7329d
Author: Martin Krizek <mkrizek@redhat.com>
Date:   Tue Dec 10 16:28:52 2013 +0100

    Sort updates by (status.desc(), pending.desc())
    
    This way an update label is correctly set when multiple updates fix a
    bug. The label is chosen by the following order (the lowest one):
    
    pending testing < testing < pending stable < stable
    
    Fixes: #438

Note: the rest of the issues with displaying label is handled outside this ticket in https://phab.qadevel.cloud.fedoraproject.org/T26

Sorting seems to be working as expected.