Having trouble with my Promatic 2 shifter... Ideas???

It seemed like a cool Idea to change my column shift to a floor shift/automatic, but it is not positive/reliable when shifting, and I am worried to wind it up and blow the motor shifting and having it not go to the next gear... My Dad's does the same thing so he just leaves it in automatic all the time...
But the reason I did this setup was to be able to do both!

Anybody have experience with this or know what to do??? Had a good tranny guy put it in, but he isn't super experienced with these...