Custom Sheets disappeared

I asked in a previous thread about rearranging custom sheets (changing the parent sheet) and was told there was really no way other than editing the XML. I successfully did this by changing the Parent properties in the XML and when I import the Customization, all looks well. Everything looked as intended when looking at it with Developer Mode turned on.

When I set this customization as the default for my menu item and launched without Developer mode turned on, all of those sheets disappeared… Still, if I launch with developer they show, without it they do not.

Any ideas?