Over Weight Axle, How Much Is To Much

OK I just had my setup weighed today and my total weight was 26,620 lbs by Cat scales at truck stop, {motorhome and stacker trailer loaded, fuel tank full and full fresh water}

Fleetwood listed GCWR/trailer at 25,500 but Ford list it at 26,000 lbs, but I have added air bags, frame extension was strengthen and larger hitch so I could tow more weight.

My only issue I have is the drive axle weight was 14,460 lbs but the axle is listed as a 13,500 lbs, my front axle was 900 lbs under its max weight, my tires have been increased from F rated to G rated so I am very good as to tires but my rear axle has me concerned, could travel with less fresh water and only fill gas tank to 3/4 but don't like that, so I am planning on shifting heavy stuff forward and removing excess heavy stuff to lighten load and moving Jeep on trailer back 2 inches to make tonged lighter and this should bring the weights down some.

But my real question is what is the long term issue with the drive axle being over weight, will this damage my axle or is 960 lbs over its weight for now no concern, planning to bring my axle weight down to 14,000 lbs by shifting things around.