1) This one's just a guess, but until you actually pick up a leve (or is it just visit the counter?), the leve counter won't increase. I know there's something that triggers the leves to start ticking up, but what that action is, I am unsure of.
2) 4 leve credits are granted every 12 hours. You can type /clock to see when the next reset is.
3) There is no limit.
4) No.
5) Same leve pool.

Edit: beaten