In my current PBEM game, I had troops bypassing Jefferson, MO via riverine transport, landing in the region to the west, and then attacking (to avoid river landing penalties). Instead, the troops landed directly at Jefferson (which is obvious from the day they arrived in this region- had they peformed the movement as plotted it would have been later in the turn) and were, suprisingly, slaughtered. Why?
this is with 11.d