It's very easy to overload a single rear axle coach, even more so with a stacker trailer. I always kept an eye on my rear axle weight on our 38' coach.
Different manufacturers hit those limits in different ways, generally the front is overloaded.
I'm very surprised you even got checked.
Now that we switched to a tag coach I don't even worry about it.
There are several companies that make a pull hitch, I'll see if I can find some links.
2013 DSDP 4347, all electric, 450 H.P. ISL
Air & hydraulic leveling
14 Jeep Grand Cherokee Overland toad