I'd say that he still expects pats on the back for anything he does (he made reference immediately to helping your daughter out) and that when he does something that is negative--taking you off the membership and not mentioning it--and your D asks him about it, he gets angry because he feels like the other things he did now don't matter. Does it make sense? No. But it seems like script to me; if you take the identities out of that exchange, there is one person who sounds like a teenager and one who sounds like the adult, and the fact is that your daughter is the more rational sounding, adult person in that conversation. In fact, I felt it very easy to visualize a 16-17 year old boy on the other end of her exchange due to the anger, the language, the quick mood swing, the attack, and the "why do you always have to take her side???"
Bottom line is that he doesn't like that you're closer to your kids now than he is, but he's too childish to see that this is a standard and expected consequence of his actions. It just reminds me of the text I got from my H the other day. "Me, me, me" and no empathy or caring for anyone else.
As a side note I don't get the impression that he deliberately let you go shopping only to be denied the card on the spot. I'm sure he did forget about it--because these people in MLC are all about taking care of themselves and having a good time and NOT facing the minutiae of daily life. But his reaction was just childish, no two ways about it.
M45 Bomb 6/09; EA 6/10; Divorced 1/11 Proud single mom of 7 little feline girls and one little feline boy "Fall down 53 times. Get up 54." -- Zen saying