Thanks guys, I feel better now
As one poster said, it is stupid that she couldn't look beyond the present and see that I could potentially return to spend more in the future. Of course, I will not, but who knows if I was blown away with their service maybe I would have.
While I understand that sometimes customers might be annoying, I don't think having a spending limit is just casue for rude behavior - especially when its a gift card, a dictated amount, its not like I even WANTED to be in her store spending money, I didn't go in saying "what do you have but thats only $15 becasue that is what I INSIST on paying.
Ohhhhhh well. If something like that ever happens again, I'll remember everyones support of the idea that its OK to talk with the manager.