Hey,
First of all, ride within your limits. If you wreck all the time, you are trying to hard. Lower your speed, and concentrate on hitting the right lines, and being smooth. As your skill increases, your speed will too, without wrecking.
Second, weight the outside peg in turns. Concentrate on pressing down on that outside peg until it's a habit. You are concentrating on your leg sticking out, which pulls your bike to the inside. That's why you feel you have to put your foot down to catch yourself.
Don't worry about other guys that are faster. Learn at your own pace, learn technique and smoothness. In no time you will be keeping up, in the long run you will blow the others away. Good luck.