I'm guessing that's your trailer?
Looks like you fell into kind of the slot I did. When I pulled the specs for your trailer (I'm assuming that's the topic) they list the gvw as 12,090, dry weight as 10,330 and tongue of 1760. They pulled that 1760 off the gvw which left them with 10330 and gave you 5200 lb. axles (10,400) to give you that extra "fluff margin".
They really went overboard on the tires and wheels; not sure what they were doing putting higher rated tires on the wheels but at least they were trying to give you even MORE margin.
Of course, I know you already knew that.
They can definitely make you shake your head....