You did not install the actuator correctly (from what I can tell). It seems like it is not secured on the side opposite the screw which holds it in place.
There are little plastic nubs that need to 'slide in' into the metal bracket on the side opposite the part with the screw.
I just did mine and I wish I had taken a picture to show you, I know it took me a few tries till I got it secured in properly. Once done it should not allow the actuator to swing the arm as far out.
'03 Grand Cherokee Limited 4.7 QD - DD
'00 Grand Cherokee Laredo 4.7 QT - Shes Alive!