No, not crazy at all! We can really go from hot to cold on an item quickly.
Once I walked into WHBM and saw these cute bootcut jeans in the front of the store. They had rhinestones on the back pockets (ooohh...). Anyway, I had to have them. Well, I needed the short inseam, so they had to order them. When they arrived, I tried them on and hated them and was angry that I had ordered them in the first place, because I had been trying to be more successful with my purchases. I stewed over it for a few days and then decided to try them again. The second time, I didn't think they were so bad. So I decided I'd keep them. Now they are my favorite pair of jeans!
With regard to getting the sale price, if you call AT and tell them that the size you ordered is too small, they should ship you a replacement for free and for the sale price. Then you return the original to a store or by mail. I have done this a few times with stuff.