Need insight on wierd problem

I went to get some gas the other day and made a hard left turn. When I went back straight the wheel was off center. I assumed something slipped. I realigned the front end today and checked everything to make sure nothing was loose. Took it for a spin made a hard turn and same thing. However I made a hard turn the opposite direction and the wheel was straight again. 8-[ What the hell s going on? Its a new steering box in it. manual steering. All suspension parts are new.