So I’ve never ever had that happen, but it looks like you somehow managed to separate the scaling and rotation pivots.
When you go to any of the move pivot, set pivot or any of the pivot command option boxes there should be a checkbox for “Rotation and Scaling” and they should both be checked. Then if you center the pivot it should put them both back at the same point.
I’m not sure how you got that to happen, the only reason I could see it moving that geometry is if you have some construction history on that surface that is related to the pivot (like a revolve for example).