Steps to recreate:
[LIST=1]
[*]File->New
[*]Set drawing mode to Pool
[*]rclick pool #0 in the combo lists
[*]click 'Edit Pool' in the context menu
[*]Set a weight to 65535
[*]Click 'Ok'
[*]Make sure pool preview below combo lists is set to 'Weighted'
[*]Observe only 68 pools (4 rows; 17 columns) are previewed
[/LIST]
The fact that there is no scrollbar in the combo pool preview panel creates the impression that there are only 68 pools.