x2 to Jack’s comment.  There is often a huge difference between the highest weight tire and the least weight on a tire, especially on a 5er or a tag trailer..That’s just due to how RV’s are made and they will always be that way because, for example, the kitchen is on one side and it isn’t on the other. It is very typical for the kitchen side to weigh a lot more.

You could be running, let’s say “G” rated tires and on a truck stop CAT scale the axle weight divided between the two tires mathematically looks fine.  However, the tire on the kitchen side could be overloaded because the weight is not equally divided between the two tires.

If your 5er or tag trailer isn’t running level that can also cause an overweight condition as weight is not being shared as designed between the front and rear axles.  (I’ve even seen this on a triple axle trailer where the middle axle wasn’t carrying its load due to mis-installation.  That was an interesting find.)

This is very important as to safety to at least know the facts.  What to do about it is a whole different matter.

Safe travels

Bill