This issue has come up several times, so here is an explanation in FAQ format:
Why do the numbers in the System Results Summary not seem to match the Position List?
This happens when you have a system that opens more than one position per symbol at the same time. RightEdge allows your system to open multiple positions for a single symbol. If you have a 100 share position open, and you want to buy 100 more shares, you can either add to the existing position, resulting in a position of size 200, or open a new position, resulting in two positions of size 100.
However, if your are trading with a real broker, the broker will (usually) not make this distinction. There will simply be two filled orders for 100 shares, resulting in a total position of 200 shares long. Since the broker is the authority on your profit and loss, it is important for our system statistics to match their calculations as closely as possible. So the system statistics calculations combine multiple simultaneous positions for the same symbol into one position. The system statistics are what are shown on the system results summary screen, and this is why the number of trades shown their can be less than the number of positions in the position list.