Car seat moving slightly when attached to pram chassis?

[ThePartyArtist]

Does anyone else's car seat move slightly when it's attached to a pram chassis using universal adapters?

I have a Cosatto travel system and Maxi-Cosy Cabriofix car seat. Cosatto have sold me the universal adapters which allow you to fix the Cabriofix car seat to the chassis. However I have noticed that when the car seat is sitting in them, it can be rocked slightly. I don't mean it wobbles about, more that it would move a little as you put baby in and out. I'm not sure if this is normal, because it is a carseat sitting on two prongs essentially - so sort of logical there'd be some movement. Or if it means it's unsafe. I have jiggled it about and the carseat won't fall off when it's attached to them. Has anyone else found this, and does it mean the combination is safe or not?

[JohnLapsleyParlabane]

Mine did that. But it was a Cybex on an Armadillo chassis.