Reg three preconfigured metrics not acting as documented in the Advanced Collections Module

Hi, my team enabled preconfigured metrics in ACM and cannot validate 3 of them: According to ACM implementation guide, Weighted Average Days Paid is calculated by adding Weighted Average Terms and Weighted Average Days Late: days allowed + days late = days taken. In the sample below, I see that the values doesn't add up (30+71.85 != 55). Could there be a bug in the implementation, or documentation?