Ocean's Eleven Error? OT

[Inthacup]

I've watched Ocean's Eleven(the new one) several times, and there are a few parts that annoy me, but this one annoys me the most. At the end when they load the van with the dummy bags, where does the filler for those bags come from? The swat team doesn't move in until after the bags are loaded onto the van, so the "swat" guys can't carry them down, and then leave them on the elevator. Neither Matt Damon or George Clooney(sp?) bring them. I find it hard to believe that they have them stashed somewhere(elevator shaft, vault), so where do they come from? Am I missing something?