Every time I use Setup Assistant to make modifcations to the current drawing file (i.e., changing the page size and nothing else), it adds extra elevation sheets. So now, for instance, for a small residential project, I have 16 Elevation sheets and 16 Mod-Elevation layers and 16 Sheet-Elevation layers. The same thing happens for Perspective sheets (or anything that has layer links, I imagine).
Why does this happen? Is this the usual case of a bug, or is the user at fault?