Auto Backup in Logic 10.3.2 not working

Auto Backup in Logic 10.3.2 not working. Not sure if this happened when I upgraded to High Sierra. Did not notice it until I needed it, then it was too late. The system will save a single copy and make a single backup, but ignores the settings for this feature.

To be clear, I have the system setup to auto backup 30 alternative versions. However It will only keep a single one. I have tried all available settings, I have created fresh new projects to test with. No matter what, only one alternate version is saved.

I have also tried reinstalling the software and deleting com.apple.logic.pro.cs and com.apple.logic10.plist. No luck. It would be great to learn if I have missed something here. Is this feature broken, or is it me?