I too am over the truck gvw but under the axle rating. One error You have made is with the trailer weight "5er weight 8880 lbs 5er sticker GVWR 12430 lbs ok". The trailer axle weights plus the pin weight give trailer weight. Your trailer actually weighs 11,240,(front axle increased 20 lbs) still under the max. I would not be too worried about the gvw of the truck since the axle is not overloaded.
John
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