Plays disappear

I am using version 2.3 and sometimes when I save plays and come back to them later the plays are missing.  As long as I am in the editor and save a play I can retrieve it, but as soon as I quit the program and yes I do save it, I come back in the plays are gone.  Sometimes I can come back in a few days later and the plays are there.  Very odd and sometimes the plays will get called in a game even though I can't see them on the Chalkboard editor.  Please help.  Very frustrating to design something and not be able to use it.