Miss matched air guages

[BlueLine]

I am trying to work out several different problems with my new acquisition a 1999 Winnebago 34V DP on a Freighliner frame and a 5.9 Cummins ISB.
The first couple of times out my Red and green needle indicators for air pressure pretty well matched and remained around 110-120. After my first shake down I dumped te airbags by energizing the MWH levelers. At the start up after this it took what I considered a prolonged time to pump the system back up, maybe 5 minutes, but they did come back. I was able to quicken the air build by tapping on the foot brake a couple of times. When I shut down the gauges would bleed down overnight, but evenly. This last time out I noted that the red needle bleeds down will traveling, but when it gets down to 102 to 103 it quickly builds back up to 110-115 matching the green needle. After this last shut down the red needle has bled down in about 5 hours to 30 and the green is still up at 100
I've looked in the manual and it indicates the green is for the front brakes and the red is the rear. My question is are the front and rear air bags attached to the red and green needles also or the needles strictly for the brakes. Tomorrow I'm going to try and find the tank bleeds and pop them and also going to try to trace and soap the plumbing and fittings along with the rear airbags. Also I'm going to dump the system with the MWH air dump to see if I might only have a sticking dump valve. I'm looking at a lot of plumbing and fixtures I've never seen before and I'm sort of stumbling thru on my own, can anyone set me in the right direction. Also the system does maintain itself while en-route but am I overworking something with this periodic bleed and rebuild of air pressure? I've probably rambled enough, but I hope I've communicated enough to some air system guru out there in IRV2 land.

[BlueLine]

This morning I checked the coach and the Red needle on the air pressure gauge was pegged at zero but the green was still reading 100. I started the MH and the air pressure started building immediately on the red needle, the green remained at 100 until the red matched the green then they both continued on to 120 together. To expedite the build I did tap the brake pedal a couple of times. I figured this would be a good time to soap everything I could find that resembled an air line or fitting, No Bubbles, I then soaped the air bags, No Bubbles I started this morning early, and so far the pressure has been holding equal on both and both needles have slowly dropped to 65 by early evening. I didn't pull the pop off lanyards yet. I'm assuming MWH made the plastic lines red and green to indicate which system they supply, they also included blue white and black in an effort to keep me wondering. I just love it when I can't duplicate a problem, maybe I fixed the unknown problem with an unknown remedy.