Just in case you've missed it, 5 points is not the maximum you can select.
It's not included in the tooltips but in addition to using shift to select 5 points you can also select/deselect maximum scouting points (20) and select/deselect maximum recruiting points (10) by pressing and holding the return key and clicking the +- buttons.
(At least this works for me when running Windoze on my Macbook).