10W laser marking stainless steel: warped images

10W laser using dry moly to mark a stainless knife blade and getting strange random behaviors. Using a vector image I run a Line Fill tool path followed by an On The Path tool path from the same image for a smooth outline. This has worked really well on wood, but for some reason there is aberration on the stainless steel. One or both of the tool paths are stretched, wavy, or misaligned. Any ideas? I don’t even know what information to provide to help diagnose. In this image are 4 processes (1&2, 3&4, 5&6, 7-9), and are 10mm, 7.5mm, or 5mm tall. Workspeed 800mm/min @ 100%, fill is 0.1mm. I am using camera capture, but not automatic height detection.