Hi Steve!
This is a bug in version 13 of JMP. Updating to 13.2 will fix the problem.
From the 13.2 release notes on fixes made:
Standard Least Squares • When you create an LSMeans Contrast and then save the script for the analysis, the LSMeans Contrast is saved correctly in the script. • The Contrast Specification boxes are aligned correctly
As for the labeling of the contrasts, I don't know of any way to easily do that.
Dan Obermiller