Table head <th> cell not receiving sorting class

[abmultimedia]

One of my table headers is not receiving the headerSortDown or headerSortUp class. The sorting function works and the "header" class is applied when initialized but the header class is not updated when sorted. Other headers in my table do receive the class. I can't seem to figure out what is causing the issue with that specific column.

[JoshWillik]

I see this problem occasionally when multi-sorting columns. Some sets of columns sort properly and add the classes to the headers. Others sort properly but do not add the classes.