I'm getting a 500 error on this part due to the lack of a 'sort_by' key. There is currently a kind of roundabout way that new parameters are added for this:

'sort_by' should be added to the dict that starts on line 55 of mysearches/views.py
a variable should be created around line 14 of templates/mysearches/view_full_feed.html to hold that value
the variable that was just created should be added to the 'data' hash in static/pager.js