Hide 'Group By' label when selection is None/Empty

I have a library set up and I use two levels of groupings: Stage and Substage.

However, under certain stages, there are actually no substages present, so the value defaults to (None) which leaves an empty value. This is fine. However, I don't like how this looks in the library because it does create an uncecessary secondary grouping with a blank name and a (#) afterwards. For instance:

-Stage1 (2)

-SubstageA (1) ExampleDoc.doc

-SubstageB (1) ExampleDoc2.doc

-Stage2 (1) -(1) ExampleDoc3.doc

Is there a way under my Stage2 example where it would simply show the document (ExampleDoc3.doc) directly under the Stage2 heading, and completely omit the grouping when it's value is null? Eg (for Stage2 grouping):

-Stage2 (1) ExampleDoc3.doc

TY! :)