I have an door entity map rotating, but the problem is when its opening it makes my door go from being completely closed to being in the middle. i.e. |_|

then it goes to |_|_|

Also how would I shift it to the left?

Sounds like an origin problem... Open the map entity in wed and position the edge where the hinge would be on the center point in the top view. Rebuild the map entity and should work..