It appears based on your given estimates that your WDH is doing little to nothing. Check your owners manual for weight distributing hitches. Your goal is probably to restore the front axle weight to unhitched weight. So your front axle lost weight and the rear gained even more than trailer TW because adding tongue weight is like a level to your vehicle's suspension.
Take a look
at this thread on how to adjust your WDH. Yes your air suspension complicated WDH. Your vehicle owners manual should also contain details with how to adjust the WDH with the air suspension. If you use a scale, then the order is not important. If you use tape measure to estimate front axle weight, then adjust with air suspension off.