Strange, I see Promotion applied twice in the summary, but it only deducts 250. Don't see it deducting the missing 150. I tried 2 times with different browser/amazon accounts so it can't be a cache problem or previous purchase problem.
I bought yesterday's deal with the T3i, 55-250, 75-300, and 700-300 and got all 3 discounts for 500 off. If I could do the same here with the 60D, I'd cancel and go for this.