Feels like you may have already been here, but just in case you got to the door but never went through it, all I've got for you is...
Click on: "Options > Media Network > Advanced > Customize views for JRemote, Gizmo, Panel"
In the "Customize Views" window that opens, select the one you have issues with in the list, then click on the "Set Rules For File Display" button.
Near the bottom, there's a "Modify Results" section, and that's where you can apply sorting rules.
I've not been in there for a number of years now, so can't say for sure how, or if, these rules propogate throughout the heirarchy, you'll just need to experiment and see what happens. You can always change it back if the results are undesirable.
You also, after saving the changes in the Media Network options, will probably need to restart MC and the remote app for the changes to show up in the remote app.
Good luck,
marko.