I think so too. I’ve bought stuff from PST and been happy with it so this is probably an isolated issue. The adjustable strut rods Rich installed fit great and allowed us to increase caster to an acceptable amount.
Maybe the UCA was jigged and welded by a trainee or a guy working his last day!
We all want definitive evidence when trying to diagnose and fix a problem. For this issue, when the stock arms allowed nearly identical settings from side to side AND the aftermarket parts were miles apart, I dont see how the blame could be anywhere else.