Allows sending up to the maximum number of waypoints (as per your current sort sequence). However, when including child waypoints GSAK does an "intelligent" calculation to determine which waypoints get sent. Basically it means that a waypoint and its children will only be sent if after sending them, the total number of waypoints is not greater than the "Maximum value". For example you currently have 5 caches in you filter, all with child waypoints:
Row Parent Child Total
waypoints waypoints
1 1 3 4
2 1 4 5
3 1 2 3
4 1 4 5
5 1 2 3
-----------------------------------------
5 15 20
We enter 15 in the "Maximum waypoints to send" box
This will result in rows 1-3 being sent and a total of 12 waypoints.
If we look at row 4, it has 1 parent and 4 children for a total of 5 waypoints. 12 + 5 = 17, which means this exceeds our maximum of 15. To keep the "integrity" of the send intact we therefore only send rows 1 to 3.