New Distributor rotor won't spin

What is your question?

Ok so I was replacing my distributor rotor and cap. The screw hole that was on my distributor broke. The rotor would spin by hand. I bought a new distributor. I installed the new distributor and it was off seated about by 3/16th of an inch. I read to start my car and it would fall into place. I went and tightened everything up, rotor was spinning by hand. double made sure all spark plugs were in the correct order. Tried starting it, and I hear a loud pop while it was cranking. I double checked all spark plug wires. They were fine. I took the distributor out and checked it. Gears were fine, rotor spinned when I was turning the gears. The pin was still in perfect condition. I went to reset tdc and reinstall everything. I realized my rotor is no longer spinning by hand, or when I turn the crank shaft pulley. What happened? What's the fix? How to check?

What makes this problem better or worse?

Wet weather

How long has your 2002 Chevrolet Silverado 1500 had this problem?

3 weeks