2. Well, you could either repost or, if it's a minor mistake you're trying to fix, just reply with an OOC message... However, try to avoid having to do this, especially if there's already a reply to your post. Look over your posts before you put them up, make sure your character is doing/saying exactly what you want them to.
3. If you win a pack, your character is the alpha of that pack. Any animal, not just a wolf, can be an alpha though, provided they can defeat the previous alpha (Water Pack's alpha is a feline, for example). If by start a clan you mean create a new group for characters to join, what you can do is create a gang--note that this would entail creating an account on a board site (I'd recommend boards2go.com) as well as having a character not belonging in a pack to run the gang.
4. The members list hasn't been updated since 2011. XD Don't worry, as long as you put all the necessary information when registering and as long as your character's name isn't a duplicate, you should be good to go.