We have a Graco MyRide 65 & Graco SnugRide - both rear facing. Both had only ever been installed (one at a time) in the middle of the back seat, using a lap belt. Since we will be using both seats now, I installed them both, one near each door. Both use a shoulder belt now. The shoulder belts have the auto lock mode - I pulled them all the way out & they clicked back in. I got the seats in as tight as I could.
I tested the seats to see if they were secure by pushing/pulling & wiggling them. They both seemed pretty secure until I noticed that they could be pushed over - sideways. They rotate along the path of the seat belt - does that make sense? The seats don't move back & forth, but if you push from the side, it will move so it is laying down on the empty middle seat next to it. I hope I'm explaining this clearly!
This doesn't seem safe to me, but I can't figure out how to change anything. Is it OK? Any suggestions on how to fix it?