I have the Orange ones. The width fits the entire footprint of the 255/80R22.5 tires. I don't see any problem. They do what they are designed to do. As for moving after chocking, do you chock before you level, or after you level? If before, you may have changed the relationship of the chock to tire. I always go back and reposition the chocks after leveling.
Wayne MSGT USMC (Ret) & Earlene (CinCHouse)
2008 Winnebago Destination 39W
It is what it is, and then it is what you make of it.