Im not sure what you're asking, but i will answer with my best guess at what you're after...
If a team is a fave on the ML but does not have the -1.5 RL option that faves normally have and instead has the +1.5 RL normally associated with dogs, it likely means that this team opened as the underdog and was bet up to the favorite. Some books offer alternate run-lines, where you can get both RL options on both the fave and the dog, some don't...