The Scanning Offset looks just fine, but the startup end of all those lines is terrible: something else is wrong.
It looks like the power starts up just fine, but the focus seems wrong, which suggests the tube is not starting up in TEM00 mode.
Set the console for a manual pulse:
- 30% power to match the scan power
- 2 ms duration to match the ugly length of the scan
Put some paper / white cardboard target at the entrance aperture of Mirror 1 and fire a pulse to mark the target. It should produce a distinct mark, not burn through, with enough detail to see the beam shape. Fiddle with the power as needed to get a good mark, but leave the duration alone, and post a good picture of the result.
Is it a new-new machine or just new-to-you?