weird thing has happened - suddenly all add-on mods sort has changed in dropdowns

I have been running my cart for over 6 months, v1.3.7.1, with many many mods. All of the sudden, without having done anything to have changed it, the sort order of the add-on mods has changed in all of the admin dropdown menus. The last things that I have done, which could have possibly affected it, is optimized the database through the store manager. Could this have done it? I have done this many times without it ever having changed anything.

I guess I just want to make sure that this isn't an indication of some type of hack activity, although there is nothing else affected as far as I can see.

Has anyone else experienced this type of thing happening? It's weird.....