That's actually a path I don't like much myself. I too took AP Calc in high school and though I passed the test and exempted Calc 101, Calc 102 was just a bit too much too fast. I ended up having to drop it the first time and take it a second time to actually get my credit.
I kinda worry about that with CS too. There are a lot of people who may think they have a good foundation going in (and they likely do), but for anyone that doesn't already have the formal education they all pick up a least a FEW new things in an intro class. Those few new things can be the difference between the 2nd class in the series being overly difficult or manageable.