You want to eliminate that yellow flame at full temp. As far as your other pans, I don’t know, but that soot can be a real pain in the rear and you are wasting propane. I have a two burner system, one dedicated for a 1/2 pan cook pot and the other for a steam table for holding, which hold 5 1/3 pans.
It sounds like you have a mix going, cook and hold setup. I wish I was more familiar with your trailer, it sounds like a question for the manufacturer. I always like getting this stuff from the horses mouth.