Last year, my Circuit City store would not PM at all on Friday. For 2 day sales, I was able to go back on Saturday and get them to PM but I was not allowed to get any of the BB Friday morning sales at all. As I have a CC 10 minutes from my house but the nearest BB is 40 minutes (and I had no intention of going there), this really pissed me off, since I wanted the Simpsons DVD they had on sale.
I'm not sure if CC would have PM'ed their own stuff. I guess you could have returned and rebought it (which you generally would have to if there was a rebate on it, anyway).