What details did they change on the plate ??
I see in a brochure while it doesn't say the GTM or ATM, I would say the GTM is about 2t while the ATM around 2180kg or near that, they have probably changed the plate so the GTM is 2t or very close. Your tyre, LR must be more than the ATM ideally ATM plus 10%, so something above 113 would be good, I would be checking the LR on the rims as well ...
The figures on the plate you need to worry about are ATM and GTM, tare and ball weight are fiction... also the GTM is a floating weight in that as the ball weight increases the actual GTM decreases something many tend to forget and of course the stated tyre/rim size is a minimum, the tyre pressure is a guide and usually incorrect.... (GTM load on wheels, ATM load on wheels plus tow ball)...
A look at the brochure and going by the stated tare and load capacity I reckon they all would be overloaded the day they drove out of the yard....