1) For calculating the required capital, drawdown is normalized to 3 years. Otherwise you would get a different required capital depending on the length of the test period, even with no reinvestment. You can find details on the "Performance" page of the manual.

2) Yes, the figures are still "valid" with reinvesting, but are mostly irrelevant. When the reinvestment changes, all figures depending on it such as max drawdown, annual return, required capital etc. also change. What you see are their temporary, more or less random values at the end of the simulation. That's why the performance of a system with reinvestment is not measured with annual return, but with CAGR, and most of the usual performance figures have not much meaning anymore.