It scoots left because of the direction that the props turn. If you were to reverse the direction that the prop turns (clockwise/counter clockwise) it would scoot to the right instead. Increasing head speed and being high enough off the ground wii eleviate this problem. If it still wants to bank left while a few feet off the ground, then you'll want to trim it.

But scooting left while on the ground, starting to get to take off speed, is completely normal.