This is not a "bug" it self, but its just a very complicated situation.
When you block a user, you don't get to see a "un-block" button. It still says block. The unblocking is a very complicated and non-logical process.
Can we make it so the button changes from Block to "Un-Block" after a member is blocked?
UPDATE: same goes for Be-friend... should also be easier to remove friends.. The system at the moment is VERY complicated.. everyone of my users is saying that.