So far with my model, my totals and spreads are very similar to the books lines for the most part, however I have noticed with games with high totals (over 210), they are usually way off, for example the goldenstate game tonight total is 214.5 right now at pinny, however my model only produces a total of 206, I have no clue why there is such a difference and it is always with the high total games. I have been working on this for the past 3 days and everything I tried hasn't worked. I know compared to the league averages, spurs are significantly above average offensively right now and goldenstate is significantly worse defensively, and my numbers reflect that, however not enough I guess 
anything specific I should look over again?

anything specific I should look over again?