Understanding the Walk Forward MaxDD stat

After a walk-forward, why does the statistic and chart not align for Max system % draw down?

-7.6% is correct, -1.73% is incorrect.

I feel it's a discrepancy in the result but really it's my reading of it that is incorrect I suppose?

2020-05-26%2009_00_49-Weekly%20BBO%20200424%20-%20Out-of-Sample%20summary%20-%20Backtest%20Report%20-%20HtmlView