Jesse, I have had similar experiences in the past. In fact, when i was writing the reply to your post about the A2.0, i had been logged out automatically, and when I logged in I got a white screen too instead of the posted message. This is intermittent, though, because on other times when I logged back in the post had been actually posted, and the screen appeared.
I don't know anything about the forum software. I'm just a user of it, like you. I do know that there is an automatic logout after a certain time, which seems to me to be variable (sometimes 5 minutes and then logged out, other times 20 minutes and still logged in). It's a little quirky, that's all. It makes sense to do that so that users who walk away (unintentionally forgetting to log off) will not tie up the system.
The auto save is a mystery to me, too.