Thanks for the replies. I think the cookie thing might be what happened. I deleted a bunch of temporary files associated with my browser and I'm guessing that something to do with OB got deleted and for some reason or another it didn't create a new file when I logged back in.
I'm just gonna use the auto-generated password that OB sent me and use the remember me feature. If someone where to hack my OB account it wouldn't be a big deal.