Ok , parts like ball joints, tie rod ends, stuff that has a ball socket etc, can get stuck in a worn position. You'll never find it until you climb under there and rap on it. It take's some time to diagnose. The alignment guys should have provided you with before and after alignment numbers, after five times they should have some kind of inkling there's an issue unless you're doing the shop hop. Something is loose if the wheel doesn't return to center, whether it's a torn bushing, rag joint, or other loose component. Rag joints when bad imho, usually create freeplay, never seen one get stuck a quarter turn off. Not to say it can't happen either, but you need to get this checked out. Some stuff is captured but other stuff it not. If something comes loose and you plow into a guardrail or family of 4 in a Civic you'll wish you spent whatever it took to get this diagnosed/fixed.
Last time I had mine aligned it was by a truck shop that did alot of medium duty trucks. Fleet work, tow trucks, county trucks, police, and all the alignments for the bodyshop I worked in. There's alot of alignment guys out there that understand little more about steering and suspension than how to run the machine they're working on. Find someone somewhere that has experience. if you don't let them know there's a problem nobody is looking for one.