Unless it lands on the 3, then you are certainly gaining an advantage!
SG lets suppose you jumped TB +3 and you bought a point tB +4, and now you have shops with Philly at - 2 1/2, why not by the point down to -1 1/2, if it lands on 2, 3 ,you win both side and 4 , you win/push. Of course you have to feel good about the score landing on the number.
For Instance, tonight my gut says TB wins outright but I don't know or care so my bet is this, because I want a little something going or I won't watch the game. My Play: Philli -142 ML and when TB drops before game time I'll buy them to +4! All I want is Philly to win by 1 -4, I like my chances!