phillyg wrote:
I think it's a bit odd and I can't visualize a scenario where it would be required. If you're bothered by it (I would be) then it makes sense for both axles to be mounted similarly. I would opt to use the higher set of holes since there would be less lever effect on the spring hangars closest to the frame.
There are some brands of trailers that have the two sets of holes. The idea being that if the truck is high and causes the trailer to ride high in front a person can adjust the height easily, without welding spacers to the frame. Good idea in my mind.
I also believe that all the bolts should be in the same level.