You have to ignore stats against Grinnell and Greenville. Both emphasize volume over efficiency. Greenville will happily let the other team score two points in the paint if they can get out in transition for a three on the next possession. Think Paul Westhead of Loyola Marymount.
There is a reason why both teams had a crazy-high number of possessions as you mentioned previously. Many players have their career best scoring, rebounding, assists and such while playing against these teams.