The above OP still has only 30 amps of service regardless of the 50 amp plug.
The Service Panel in the RV determines the amount of amperage, in your case 30 amps.
The 50 amp adapter works in situations where the campground breaker may be bad.
On my unit we have a "sticky" on the microwave that says "turn AC OFF when using microwave!"
Nothing wrong with your rig.
I even added a couple of outlets inside my RV that are direct wired and separate from my RV service panel.
A cord plugs into the campground's 20 amp plug and I use this to run fans or a heater in the winter time.
By doing this I am not taking anything away from my 30 amp service panel.
Just an idea for you.