Is there a reason kits are named 1,2,3 etc. and don't have real names?

I’ve just downloaded the Birch kits, and they’re simply named 1 - 25 in the steps folder, rather than by actual kit name. Seems that all factory kits are the same.

Is there a reason they are numeric only? I’ve just gone through and renamed them all (i.e., “10. Motown Kit”) and it’s displayed correctly on the step and the song saves/loads ok.

Don’t want to be renaming them if it’s going to cause problems - any thoughts?