Actually, this is a Swivel Hitch (Yes, it's the part we mostly refer to as the coupler, but they have been called swivel hitches for as long as I can remember.. right or wrong)
They turn a full rotation to compensate for the lean of a motorcycle.
BUT.. As Bill suggests .. I think Marie is actually referring to a Swivel JACK. YES.. replace it if it's wonky! I have seen my rig drop in front from a faulty jack.. it was slow motion terror!
Marie, I have put one on every trailer I owned. Mount it as close to the COUPLER as you can, and don't push it across the country.. you will be fine. No frame twisting if used correctly. You can push a few feet .. thats what it was designed for.
Now, don't let your neighbor walk it across the street to his house on it...