Analysis shows positive monthly cash flow but a negative 50% rule

[Will Stewart]

Can someone explain this like I am 5? So in the analysis of this property, it shows a positive cash flow of around $300 a month. However, when I look at the 50% rule at the bottom of the analysis it shows a negative cash flow of around $105. This has me confused and I have watched the explanation of the 50% rule several times. What am I missing? Thanks as always!