Brushes move to bottom of brush library randomly while I am painting
I do a lot of digitial illustration with lots of brushes, all neatly organized in folders. For the past six months or so I've noticed that a brush I am using will, seemingly at random, move out from it's designtated folder down to the bottom of my entire brush library. So I'll go to select a new brush (by right clicking while using the brush tool to bring up the library) and discover the brush I'm currently using is now is at the bottom of the list. Then I have to drag it back up and find the place in the folder where I had placed it originally.
Is it possible there is a shortcut for "Send brush to end of library" that I'm accidentally hitting? or is this a weird bug? Any help would be greatyl appreciated, because it's maddening.
Most up to date photoshop, Mac OS.
