Reverse parking lines turn opposite direction they're supposed to...

[greyscout]

This has been since installation. When my back-up camera is on and I turn the steering wheel, the lines on the screen turn the opposite way they're supposed to. A post I saw on Facebook about this problem had no functional solutions. The only "solution" it had was mirroring the image in the settings, but this results in the image being backwards and the lines still going the wrong way. I'm guessing this is a wiring issue, but I'm hoping it's something easier.