In the performance report, there is a column called Wgt%.

It should be "Weight of the component; contribution to the overall profit of the strategy in percent. The weight can be negative, f.i. with a losing component and a positive overall result."
Source http://manual.zorro-trader.com/performance.htm

But the sum of all the Wgt% numbers is usually NOT 100, even in the manual example.

How should I interpret the Wgt% number?