Overhead door

I created a simple box separated with a big hole on the center. I added a brush on its side and tied it to an entity and origin. Func_tracktrain
Then I created path_tracks to designated destination and recreated
path_tracks just below one frame for it to return on.
I tied this all to a trig once button and MM this is not the look I was
wanting.
It goes up nice and smooth at the end though it flips around and does some
weird sh*t before it comes down?
My ultimate goal is to tie it to one button for up and down operation!
I looked at the map vault and found one map called Garage1 which w