Secondary Sorting - How to sort by address

Hi All,

I hope you can help me out.  I'm trying to create a Patch Sheet for my venue.  So I have the lights sorted by Fixture Mode and would like the secondary sorting to be by address but every time I go to Setup>Sorting and move Address or Channel (that would also work for me in this circumstance.) to the top of the list it doesn't take and puts Position back on the top of the list.  I've created these sheets many times but for some reason I can't seem to get the sorting to work for me this time around! 

ANY ADVICE OR SUGGESTIONS WOULD BE GREAT APPRECIATED!

Thank you!

Dinah