Same with P47M with two wing fuel tanks... haven't checked the other models yet. I was wondering why after a while the plane had a tendency to roll left like the 2nd drop tank (right wing) was off already. And its a bit annoying when you want to jettison the said R/H dry tank but get stuck with jettisoning the one full of fuel first, thus reducing your flight time considerably (you can still keep both tanks if you want until the left side is dry).
Although any well aware pilot would check his fuel tank selection prior, during, and after the flight for realism and SA, the auto fuel mode should still dry both wing tanks at the same rate for CG issues.
EDIT: tested out D-25, D-40, and N models, same thing with either 2 or 3 DTs.