It is ok, and your terminology is fine. I understand what you are trying to do. I did provide a link to the exact steps we suggest for create a “waste-board matching grid project” for output.
Here I went into greater detail: Drawing a grid the size of my burn area - #8 by Rick
You replied that you had success with this process and ran that job. Please show the result. Where did you have the ‘Job Origin’ set? Show us how that file looks in LightBurn (screen cap entire window).
This may help in understanding how the Coordinates and Job Origin settings affect the location of your output.
Is your waste board and laser frame fixed together, meaning stationary, so they don’t move independent form each other? To have repeatability, you will need these fixed to ensure the registration of your grid stays calibrated with the actual movement of your laser. If the waste board moves, registration is lost.