50 amp MH, plugged into 30 amp, ok to run 2 ac units??

Only 1, or things will turn ugly.

As another recently pointed out to me, a 30A outlet is only intended to deliver 24A max continuous.
I think if you go out and check the plug, it may be quite warm. You should also check the voltage inside your RV. It could be very low.

Fridge,water heat and everything else on propane or off and watch your voltage in the RV stays 108+
Still may not work.

The simple answer is NO. Each AC unit will pull from 12 to 15 amps HI cool. That leaves you with 3 to 6 amps left for everything else in the RV. Your refer on 120 pulls about 2.5 amps to 4.0 amps. The Power Converter/Inverter-Charger 1 to 3 amps. Add other 120 appliances and you will overload the system. Also, monitor the actual 120 line voltage with a digital Voltmeter. Odds are the line voltage will also be lower than safe/normal operation. If below 110 volts, then shut off 1 AC unit and run it on Hi fan only. There are NO safeguards for running systems on substandard supply poles. If the voltage is LOW, then you risk harm to some appliances including the roof AC units. Doug