Lube Disk for 5th Wheeel Hitch.

I've alway use one and they last forever with one exception. If I need to take my fiver into a dealer and they move it around in their yard when I get it back the lube plate keeps falling off. The figures that hold it onto the pin are bent and will not stay on the. The last time was at a camping world and I checked it when we got it back and sure enough it had come off and they had put it back on. When I told them about they had bent the figures they said it came in that way and I needed to replace it. Seem funny it only happens when I take it to a dealer.