If anyone else has one of these and can spare the time ... have just fitted this new car seat myself and noticed that it's not held fast in place like the 2nd stage junior version is (the 9mths to 4yrs one) and you can wobble it from side to side if you jiggle it ... is this normal or have I fitted it incorrectly do you think? NB. the Comfort Base plate thingy is hooked under the car seat its against and through the other side.