Geeetech

Hi,
Using Cura 4.9.0 and A30T and tried my first two prints.
At 50% through printing the same .stl file ( but with differing settings in Cura) I'm getting about a 2mm shift in Y axis for the remainder of the print.
Photos are a top view with two end views.
I've no idea if this is a Cura problem or a ...