I am running CADWorx 2016 on AutoCAD 2014 and 2015.
I have an angled relief valve that when I try to put it on a line that goes down then left or right.
The Valve will break the line correctly, but will insert the valve rotated 45% off the corner of the line.
It sounds like you have your running osnaps turned on. CADWorx PID rarely requires osnaps when placing components as long as the pid was properly created using the snap grid. Turn off your osnaps and try to insert the valve again.