Yes, what Seth said :)
On the reply piece, that shouldn't be the case...when you're under a certain amount of posts (20?) there are only certain parts of the board visible, but I think you should be able to reply to anything visible. After that set # of posts, more topics on the board open up to you. I'm working on the issue of your only being able to reply to your own posts...there's probably an easy way to fix for you, and I will take that route if I need to, but I'd like to figure out why it's happening overall (for not only yourself but potentially others coming behind you) and do a more general fix. It will take just a bit, I'm looking...James.