Leslie, I'm so so sorry you have to go through this. It sounds like your hubby wants his cake and to eat it too. If he isn't taking the steps he needs to take to gain your trust back (i.e. everything you asked him for - to cut off contact, move to another dept, etc), then it doesn't sound like he is serious about you and your relationship, which is not cool. Like Nadine said, follow your head on this one...you KNOW it isn't right.
Big hugs - you know we are here if you need us!