I was interviewing for a really great job and the head of what would be my new department asked to meet me for an interview over lunch. I met him at the fancy restaurant that he had selected. We had what I thought was a positive interview until the very end. He concluded the interview, asked the waiter to split the check in half and then excused himself after paying his half. Was I wrong to assume that he was going to pick up the tab? Am I being overly sensitive if this makes me think twice about accepting if I receive an offer?