The fact that it worked 30 seconds later means your probably fine. You shouldn't worry. If the DMV gives you a hard time about removing early, call a lawyer.
No answer here should be considered to form an attorney-client relationship. You should consult with a licensed attorney in your jurisdiction so that a full evaluation of the facts of your case can be conducted.
Watch the mail for a letter from DMV. If anything happens they will send you a letter. Take you vehicle in to be checked four months after your license was issued. Most likely they will send you a letter telling you that you can take it off.