There appear to be some counting discrepancies between the column browser and the main library.
Firstly the number of albums shown in the column browser for the entire library does not match the number of albums shown in library statistics:

Even stranger, when I create an autoplaylist with condition Track # = 1 to give a count of the number of albums it returns 3037, not 3036. In addition not all the tracks in the playlist are shown in the column browser:

Here The All-American Rejects and The Allman Brothers Band are absent from the column browser, there are a few others missing but I haven't identified which yet.
I can upload the DB or a debug log if needed.