Left/Right, Up/Down Jog Distances are Different

[parsec (FerAS)]

And if you first jog left 1" what happens when you then jog right?
You can run the file in the following link to check for mech issues:

Burn Offset LighutBurn 1.7.03

Given one picture and four words, I think @JimNM has nailed it. This test pattern helps identify mechanical problems: GrundTest.lbrn2 Scale it to fit the platform and run it as fast as it will go in Line mode with optimizations turned off and power set to mark a sheet of cardboard. Any differences from the design will be informative. Upload good photos of the result so we can look over your shoulder.

Post back the output.
If found some read this:

Guide to mechanical adjustments and maintenance