1. Yes, Lee dies are compatible with Dillon equipment.
2. Conversion kits come with shell plate, powder funnel, and location pins.
3. Seperate powder dispenser, powder die, and tool heads for each caliber is really convenient, but not necessary.
4. My experience with Dillon equipment...
Sounds like the process worked!
It also sounds like the error could have happened regardless of how the scores were initially entered. Good job everyone!