From what I know, steam looks solely at your licenses. If you have the license to the game in your account, it will (or should) be included.
So it looks at neither your library or your history.
Your example is a bit odd though, not sure I can explain that.
Comment has been collapsed.
536 Comments - Last post 3 minutes ago by DazeTheBearChieftain
5 Comments - Last post 37 minutes ago by jiggakills
8 Comments - Last post 45 minutes ago by SelectiveOblivion
3,900 Comments - Last post 1 hour ago by MeguminShiro
126 Comments - Last post 2 hours ago by Joseahfer
131 Comments - Last post 3 hours ago by DarthSidious
370 Comments - Last post 3 hours ago by Warriot
41 Comments - Last post 7 minutes ago by alpshrk
906 Comments - Last post 8 minutes ago by MrOuiOui
1,067 Comments - Last post 24 minutes ago by LoraL
417 Comments - Last post 29 minutes ago by quinnix
240 Comments - Last post 31 minutes ago by kobra5
146 Comments - Last post 44 minutes ago by Snake994
2,332 Comments - Last post 59 minutes ago by Ceceros
You know when you buy some games, such as COD Black Ops 2, you get the singleplayer, multiplayer and zombie mode? For some reason the number of friends who played the game seems to be different even though they all thereotically own the games.
So I'm guessing Steam looks at your play history rather than your library? Doesn't make that much sense to me since free weekend would also be counted.
Comment has been collapsed.