Like MisterCat sayed, I think it's the "not-played" forgetting penalty.
It's very anoying because, when you connect every day, you lose some respect, even if you connect within 24 hours.
For example, it connect at 5pm, leave at 8pm after a last Champion contest, and then when I return the next day at 5pm, I loss some respect.
Seeme I have to connect during lunch not to loose something... But I can't do that at my job...