New issue with 9 pro. In relation to recording mono tracks (Not sure how best to describe my issue)

So basically, I always record vocals in mono. No shock there. My last few sessions I’m recording a L and R take to do a hard pan, except when I go to manipulate the individual tracks, the pan is screwed up. I have to pan Hard left 100% to bring them to center, so theyve both effectively gone into Right side pan.
Can someone help me with this?
Win 11, Cubase 9 pro