Its normal. Seems to affect the cars worse when the tyre tread is low. I notice it sometimes when reversing out the drive, the pavement often has a fine gravelly ming on it, and you can feel the front of the car skitting about at full lock when reversing on it.
Its probably just the camber angle on the wheel.
Ofcourse it could be made worse with worn bushes, as you may find the bush "winds up" then releases causing slip.
All cars drift to the left, mainly because the roads are always cambered left to allow rainwater runoff!