You might want to double check the exp share as on heroes and DM2 it was funked.
It was listed as 100% 120% 130% 140% divided by group size n = 0, 1, 2, 3, but in actuality it went n = 0, 2, 3, 4, so a 2 player group got a share of 130% instead of 120%. Which might be why the share seems so...