Help please - offset centre of rotation ?

[MikeODay]

I think I may have originally posted this request to the wrong forum:  https://stargazerslounge.com/topic/263797-help-please-telescope-alignmnet-offset-centre-of-rotation/

Can you help please -  I think the centre of rotation of my telescope is offset from the centre of the image sensor.  (please follow link for questions and images)

Much appreciated.

Mike