I went to My Player, which apparently turns on Autosave. Backed out and it took me to NBA Today for w/e reason, which uses Living Rosters loaded from the 2K Server. I back out, as all I really want is to check what changes Ramon Sessions got in the recent update (78 passing from 95 - this Insider sure works hard man). Anyway I finish editing and the game decides to autosave over my roster file. Apparently my roster was the "active" file even though 2K's roster loaded off the server.
Fortunately, I've been keeping a duplicate file just in case. I suppose I could have downloaded it from 2K Share though I've made quite a few changes the last two days.
The point is, this has happened to many other roster editors (including myself, sans backup, last year). Why can't 2K come up with a freakin interface that isn't monkey crap? I guess for the same reason they are destroying NBA Live in sales yet we won't have updated rosters online until JANUARY - a "mere" three months after the game's release.