Once you pay the bond, the warrant should be lifted. If it is an appearance bail you posted and not on any money you owe for fines, it should be returned to you after your last court appearance. But this assumes that you are going to show up to court until it is over.
That is correct. But before you send in the money, get in touch with your lawyer. If you don't have one, get one. In many cases like the one you describe I have been successful in removing additional penalties for clients, but without all the facts I can't really comment on what will happen when they schedule you for Court. If you want to discuss this, e-mail me at email@example.com