A collection of gerber viewers you can use to double-check:
Also, can you make out where the center of those circles is relative to your board outline in your original layout in pcbnew (with that pic from the fab)?
Is it the absolute origin (0,0)?
I did some paintshop on the image.
The yellow stuff should help determine the center of the arcs by using the board outline in pcbnew.
The red rectangles mark out the culprits I’d say. The arcs start in a corner of them, but don’t end there. Something in those footprints arc definitions (silkscreen, etc.) has gone bad.
