Of note, through all of this I've replaced both rear wheel cylinders (one defective, and one because I needed a later style one to go with my AL master cylinder (bran new for an 89 Diplomat) and the RF caliper after I broke the bleeder screw off.
And it's confusing.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.