Solved Uneven First Layer on one side of bed

Some of the problem with S3D is that like many more complex programs there are many ways to do a task.
I certainly am not an expert with it by any stretch and I have seen this sort of thing. This is why I always go for the way that is most straightforward.

If I add it to the startup GCode I had better see it in the output GCode or something is major wrong. The other ways of setting it may involve other things... I am just now learning how complicated S3D really is now that I am using it with both the Robos and a Delta. These are totally different machines and if you slice it for wrong one then it will crash the printer rather hard

Let us know if that does not solve it for you.