Why the distinction b/w single and stacked balloons?

Why does SW make the distinction between single balloons andstacked balloons?? Why not just have a balloon button and thenallow us the option of adding extra balloons if we want?? So manytimes I end up deleting single balloons and replacing them withstacked balloons because I need more detail. It doesn't make senseto me, am I missing something??

JoelSolidworksDrawings And Detailing