In iTunes 12 (.4.0.119) different total play length times and total media sizes are displayed in the status bar when in different views of the same media type, music.

For example; when in **album grid view** the status bar displays as below (line one is normal, line two is after being clicked) —

![see screenshot][1]:

    630 albums, 16.5 days, 50.97 GB
    630 albums, 12:12:05:43 total time, 50.97 GB

When switching to **artist or songs (list) view** the status bar will display as below (again; line one is normal, line two is after being clicked) —

![see screenshot][2]:

    10,287 items, 29.2 days, 88.69 GB
    10,287 items, 29:05:09:55 total time, 88.69 GB

Also, when switching from album grid view to **album list view** the status bar will also change to as it is in the artist and songs list views.

My only theory is that for some reason in album grid view compilations are not included in the results for the status bar though the number of albums (630) must include these still.

  [1]: https://i.sstatic.net/ur26L.jpg
  [2]: https://i.sstatic.net/kXqOL.png