Flawed Success Turn Signal Puzzle

[Tire Guy]

Today I worked on restoring all the lights at the back of the truck. I had no brake, tail or turn signals. The PO had installed a new wiring harness but nothing worked right. So I installed:
LED tail lights
LED turn signals in bed rail pockets
LED license plate lights
LED bulbs in front for turn signals
LED flasher

I pulled everything down and started from scratch and ran new power wire for the brake lights. I test ran everything to make sure all the lights worked then did the install and wired everything up and they look great. I soldered and shrink wrapped all connections and did a nice tuck on all wires. The brake and tail lights work like a modern car.

However, the turn signals all flash front, back, left and right with the turn signal lever in either position. Like emergency flashers. The turn signal lights also come on with the tail lights and they shouldn't. They look great but not how they are supposed to work.

Everything is wired correctly from the firewall back. Any ideas on what could cause this? I am stumped.