I just lost 80 bucks betting on a LIVE -500 line when it was actually the losing team. I'll take it as a $80 dollar lesson to double check the name next time, thought I'd share this with you so you wouldn't have to learn the hard way.
ALWAYS double check the name of the team your betting on. There are people who constantly try and put in wrong lines when a team is 100% losing, making you think it's the line of the opposite team.