double door texture is messed up

Put the summary of the bug you're having here

What I expected to happen was...:
the handles on the door would link and if i opened one the hinge would stay in the same place

What actually happened was...:
the texture on the door made it look like there were two singular doors, but they acted the same as one double door, and when i opened one of them it looked like what a normal open double door looks like, but with the other door when i opened it the texture flipped so that the handle was on the side of the hinge and the hinge turned back like the handle

Steps to Reproduce:
1. make a double door
2. open both doors individually, and then both at the same time
3. ...