Emily,

You can play around with the float, also keeping in mind that you're also controlling the release point. I needed some float, but I also wanted to make sure that I come out VERY quickly, when needed. If you're still having trouble getting out, bring down the float limits a bit (the small philips screw on the outer edge of the cleat) and see if that helps. I have mine set so that I can't hit my heel on the crank on the inside, and I have just enough on the outside so my knees are happy yet I can release without really twisting too much.