Indeed. I worked for a similar outfit. Often I'd do the walk round and see a 1-2cm space between chock & wheel. Front steps extended. I asked the ground why the gap? "Because they become stuck under the wheel if we chock 'em too tight." So the a/c could roll enough to perhaps twist the steps. Captain at fault, naturally. Chocks were in.
And then we get the chestnut of SOP's that said 'Main Wheels' need to be chocked. Of course the agent who operates much on the right side of the a/c chocked only the right mains. Ok for me, but not for some. Then they started chocking just the nose wheel fore/aft, because that was by the headset for push back. OK for me, but not for all. You couldn't win.