Image not centre to the device

[RichAppz]

This piece of code is great, but I am having issues with the image when it is not placed in the centre. I don't know what I have done! Don't know if you have see the iPlayer Radio App? There is a circle that rotates down the bottom. I want to basically replicate that.

The issue is as soon as you pull the image away from the centre of the screen > run > rotate with touch the image moves towards the centre and back as you rotate the image.

Any ideas or changes would be greatly appreciated. Thank you.