This sounds like the bullet connectors in the rear tub area for running and directional on the rear loom are reversed to me. I would pull up the wiring diagram, and double check those connections to make sure the color code combinations for each bullet connection are correct on both sides of the connection.
Alternatively, issues like these are so easy to isolate with a circuit tester. Start by testing the connection to each light in the rear is getting what should be expected, and when you find something that is unexpected, work your way up the wire.
ISIL and al qaeda can go F*ck themselves...