Wdopgal, there are many contract infractions in the things you mentioned above, each one you could grieve. If you are ever "asked" to go into the manager's office you need to say, "If this conversation is, or can lead to discipline, I want my union steward present."
In this way if the conversation continues you can receive no discipline. Whenever you are told to work a route under the evaluation on a heavy day tell them it is not possible. If you curb your wheels, pull the brake, take off your seat belt , take the key, get your scanner, get and carry a 50 lbs. dog food box up to the door and return to your vehicle, you spend much more than the 10 seconds your evaluation allotted or pays you. Do they want you to work UNSAFELY? There are many examples of how your managers are managing incorrectly, like the one Deer Smearer listed above, print out each one from this site and post them on the bulletin board, or your case. Let them know, that you know they are wrong. Call your district rep. (you obviously have no local steward) and explain the mess to them, and that you are ready to fight to keep sanity in your office and to keep the good Rca's that are ready to quit because of how they are being treated.