Trailer Suspension Problems

I have worked for Uhaul for the last 35 years and it has been my experience that when one of or both of the equalizers freeze up ,in which inyour case you said one was. it will make the trailer springs appear to be arced out, If you free up the equalizers and change any bushings that are worn , you should be fine. while you are at it check to see if you have any cracked leafs in your springs,
Good luck with it.

Bob