Making ready design for cnc laser cutting

[#1]

Hi,
I am a photographer, and I was aiming to make some gobos for my lighting snoot from ready jpg/png raster designs that I converted to vectors using adobe illustrator, which I succeeded by following instructions from many videos on youtube, however, when I delivered the ai files to the engineer operating the cnc machine, he told me that all the lines were cut, and he had to re-draw them to join them so they would be suitable for the cnc machine software .. I hope someone would explain what this means to me and how to do that in illustrator plz .. I'll attach 4 jpg designs, and I'll post a link to their vectorized shapes as attachments here does not support ai files.
Vector shapes: https://gofile.io/d/rtvuML

Thanks in advance

[#2]

Hi,
I am a photographer, and I was aiming to make some gobos for my lighting snoot from ready jpg/png raster designs that I converted to vectors using adobe illustrator, which I succeeded by following instructions from many videos on youtube, however, when I delivered the ai files to the engineer operating the cnc machine, he told me that all the lines were cut, and he had to re-draw them to join them so they would be suitable for the cnc machine software .. I hope someone would explain what this means to me and how to do that in illustrator plz .. I'll attach 4 jpg designs, and I'll post a link to their vectorized shapes as attachments here does not support ai files.
Vector shapes: https://gofile.io/d/rtvuML

Thanks in advance

[#3]

I'm not quite sure why he would have needed to redraw them. Probably re-organizing the Illustrator file would have been sufficient.

But that depends on the exact file specifications that he handed you.

[#4]

I wonder if you have checked the attached files for any potential issues?