Your prop shouldn't ventilate except maybe on sharp turns at high speed. You shouldn't be running with the engine fully trimmed in. That's just for getting on plane. If you run with the engine all the way in, the bow can plow and lift the stern.
Your engine might also be mounted too high. Grady normally recommends the second hole from the top. You can easily tell if your engine is too high or too low. Run on plane with engine trimmed about midway. Have somebody look at the anti-ventilation plate. It should be right at the surface of the wake. Not buried (too low) or more than an inch above the wake (too high).
This is all new to me and I appreciate the help. I was basically trying to make sharp turns and really didn't feel like the boat "dug in" the turn. The BoatTest.com and Randy Vance videos both suggest to me that I am not experiencing normal behavior. I will have to check with my dealer about the alignment, or maybe I am doing something wrong.
As to trimming up. I thought that this is done after getting up on plane. Being new at this, I wasn't up on plane so didn't trim up the motor. I'll pay more attention to that next time.
Sounds like you are new to the boat. Try doing the same maneuver without a tow. see if it does the same thing.
Running at 2000 rpm isn't a normal speed for anybody.
You might just be in that limbo between planing and displacement.(you are plowing)
When I tow tubes I goose it to get up then back off and stay up while towing.