What lineup were you adjusting when you noted you had 10 enthusiasm? If it was the lineup of for the same day, then the fact you were still able to adjust it means, I think, that the enthusiasm displayed was the enthusiasm prior to the game. So your enthusiasm the next day should at least display 11. If you were setting a lineup for a later date, then it's possible, like the other poster said, that the update of enthusiasm had already happened, and you wouldn't be able to access the lineup page for the game about to be played.
"Air is beautiful, yet you cannot see it. It's soft, yet you cannot touch it. Air is a little like my brain." - Jean-Claude Van Damme