Center point snaps not in the center

Rhino Rhino for Windows
1

For some reason my center points are not snapping to the center of the plane. Some are on center and some are not. I have reloaded Rhino and run a virus check but I am getting the same results. I have never seen this before and I`m at a loss as to what else I can do.

Any tips?

2

Please post a file that shows the problem.

3

Its sorted now. Thanks