Drone motors not functioning properly

It seems to be that rotors one and four are somehow connected to one another. In the motor test section of QGC, both motors two and three turn on and rotate just fine, but slider 1 activates both motors 1 and four, and the same with slider 4. I have tested the esc wiring and switched around connections, and nothing fixes it, so I am at a loss as to where I should go now.