Automatic Transmission Shifts without button press

Take the shifter apart, sounds like previous owner might have rigged something. An Allen key and turning the knob handle ccw takes it off I believe. There should be a spring in there and a cable. Get a manual too.

I'll be sure to try that. Won't be able to try until tomorrow but I'll bev sure to take it apart.

its threaded on too far

Interesting. So once I get it apart it should just be a matter of loosening the threads on the button that connect to the cable?