What the deuce could be wrong with this album?

I have this Kings of Leon album in my iTunes. It’s called Only By The Night. Kings of Leon was spelled Kings Of Leon, so I changed it to the former. When I did so, the first track is now categorized as a separate album from tracks 2 thru 11. The spelling is the same (capitalization and all), all the track numbers are the same (1 of 11, 2 of 11, etc.). I have checked for extra spaces before and after words, and I can’t find anything different.

I can’t seem to figure out how the sorting is different! What could I be forgetting to check? I have a feeling my mind is passing over some small detail, so I need your help as to what I should be carefully looking at. Here is how iTunes is categorizing the two albums.