leaf spring broken..trailer legs?

Thanks one and all.....I have used these (Trailer Legs) for 3-4 years now for long term storage (winter) and they work perfectly! Recently noticed broken leaf spring on right side after setting up on "Legs", hence my question.......During my repair of spring, I discovered that same spring was replaced prior to my purchase (used). My dealer thinks the spring I replaced was wrong spring and simply broke again....