Soooo, the file has finally opened. You did not say which cells contain the formulas you refer to, so I'm guessing.
M20 =IF(L20<>"",IF($I20=L20,$G$18+$D20,0),"") This returns 30, because the condition of the nested IF is true. I20 = L20 (both cells contain "NE Patriots")
K20 =IF(J20<>"",IF($I20=J20,$G$18+$D20,0),"") This returns 0 because the condition of the nested IF is false. I20 is not = J20. I20 has "NE Patriots" and J20 has "Baltimore"
You could have posted just the few cells involved instead of a 3MB workbook. Also, it would have helped if you named the cells that have the problem. Don't make it harder than necessary to help you. Just saying.