Ever call a dog and they don't want to come for one reason or another? This could be because they're comfortable where they are or they know you want them to do something they want no part of. Our dogs have long learned the game of pitting people against one another in those situations. They always siddle up to another person in the room as if that person can then protect them from having to heed whoever's calling them. Ever better if the person they go to starts petting them or otherwise showing them attention. Then they flash a look at you that seems to say clearly 'Well, I would have gone to you right away, but surely you can see I can't leave now. It wouldn't be polite.'. They're tricky little bastards.
I guess I can't complain. Just think. It could be something worse.