looks like they tried to keep our double play, home/home series with our neighbors (NE, MN, NW, and WI). I assume alot of other schedules look like that? I would guess most of these are double plays: PU/IU. PSU/RU/MD. UM/MSU. IL/NW. WI/MN. OSU/UM.
I think the Iowa Women's sched has the same double plays of MN, NE, NW, OSU, WI.