Rocky,
Dash gauges are notoriously inaccurate, therefore I say they are for entertainment purposes only. With a handheld volt meter, what is the voltage at your chassis and coach batteries after coach has set with the engine and generator off, and without being plugged into shore power for an hour? After you have those readings, what is the voltage for each battery bank with the engine running for ten minutes? Then what is the voltage for each battery bank with the coach plugged into shore power and the inverter charging for ten minutes? With these voltage readings, I can tell you the functionality of you coach charging systems, and if you need to look at a needed repair or not.
If you do not have a volt meter, you should get one or be prepared to waste a lot of money at RV repair shops. You can get one at Harbor Freight for $5 that is not professional quality, but it will do most everything that the average owner needs.
If I just confused you with this post, and you would like a more detailed description of your coach's systems, just call me at your convenience. 713-254-4156
Gerald