Hi,
Logos 5.2a RC2 for Mac,
Start Library, Sort by Series, Look for The Pulpit Commentary, scroll down to "The Pulpit Commentary Index" as per screen shot, hover over any of the Community Tags, you should see a pop up showing you how many users use the selected tag.
Logos 5.2a RC2 for Windows works as aspected, see screen shot below, however, Logos 5.2a RC2 for Mac there is no such pop-up.

As an aside:
- We can see how many Logos Users have blindly tag the Index as CommentaryExegetical
quick "rename" or "change" or "Edit" (or whatever Logos finally calls it) your tag.
- This is also an example to justify my other post to allow user to rename a single tag. http://community.logos.com/forums/t/82723.aspx