posted odds after game different

I know the whole world knows why the odds of college games when posted on cover are not the odds of the game.  Can someone explain to this idiot what it is I just dont get

Covers most likely takes the "averages" of odds from multilke books and throws it on the matchup page. 

Come to this website for the info/data, NOT for the live scores. If wanting live scores, look elsewhere like the live odds section of your book which has to keep current, fresh scores due to the nature if their business..