I never said Numbers are accurate and inflated for same game. Situation 1 and 3 are for different games.
when I say Number is level fielded what I mean is spread is kept to make odds LEVELED or equal for a 50/50 probability. Example, a team with power rating differential of let’s say 7 is expected to have a spread of 10-12 playing at home with advantage, however Books are keeping the spread of let’s say 5-7 or in other words LEVELLED to make it 50/50 probability for the game ( could be due to injury to some players or other factors that we can’t predict).