RE: Exp from thieving bug?
I think experience from stealing ultimately depends on how much you've put into your thieving skill. For instance, if you have 300% steal, you get no experience at all for stealing. If you have 150% steal, you'll get experience points for stealing x number of items, and if you have 50% steal, you'll get more experience for stealing the same number of items. The lower your skill is, the more experience you'll get (which makes sense, since it's harder, and you're learning from the challenge, thus gaining experience).
So I don't think this is a bug necessarily. There's just a limit to how much experience you'll gain from one steal, combined with your skill in thieving.
Argh, I usually never post, so I might not make sense.