There is about a half second delay before your side thrusters adjust for the rotation of the station on launch, resulting in the right lurch. Now, with inertia and all the ship should go up at the same speed as the station rotation, so hopefully it's not intended and will be fixed.
The best way to leave the pad is to up thrust as the ship is freed for take-off.
If you actually work out the vector for the ship spinning with the station you'll see that it really will lurch to the side and try crashing to the "ground"
