All is well at Mike 397x 's  house.
Most of the confusion came from Canon's naming of it's printer slots.
Rear Tray is actually the front paper feed.
Rear feed in the very anal area of the printer is called The Manual Feed.
Easy to get mixed up, and then error messages pop out when  the wrong size paper is in the Manual feed, and it should be in the rear tray feed which is actually the front feed.
Got it?

Best part is that Mike and I got acquainted over the phone, and I slid him over to the "friend" side of the ledger.

Fred