Well, I have some additional information on this. After trying some configuration file manipulation, I finally decided to just try deleting an srm file to see if it would create a new one. It did…so, for some reason, all my backed up save files (I had recently formatted my SD card and started over with RetroPie) are not being overwritten. So, either they have a lock on them, or the emulator just doesn’t like the file. I’m thinking I can probably rename them .old while the game is in progress and force a new save upon exiting.