Salt feature

I noticed if I do a “Generate Automatically” on the salt feature it fills it with all the entries from my stylistic alternates feature.

Are the ssxx entries supposed to be in both places like that?

Illustrator does not support ssXX and Indesign does not support salt…

This is just the default, for the reasons Georg cites. Of course, feel free to disable the automatic generation and do it the way which is best for your project.