Tire pressures. How can this be?

Okay. I think I have a handle on it. I was originally not sure of how the pin weight would affect the overall weight of the trailer as distributed over the axles. This clears it up for me.

Thanks guys, I really appreciate the help. I'm trying to avoid blow-outs and I know that having the tire pressures correct is important to that. I'll run everything over a scale this weekend as we head out to get exact numbers.