Sorry for the delay-- somehow I didn't see a notification for this post. The banding in the pictures isn't layer shifting since it doesn't happen all the way around the part. It looks like more a function of the slicer. In the first picture, it is clear to see how the layers affected near the top of the part are only those during which the hole is being printed. This is probably that these layers are cooling at a different rate than those in the rest of the part, so you could try tweaking cooling settings. What slicer/software are you using?