I'm having problems with rail connections in two places.
(1) Copiah (Jackson is the city), MS and Shelby, MS (the province to the immediate NNE). The rail link here is not working. Soldiers assigned to rail through this area are either diverted to the rail spur east through Meridian, or disembark their train and reembark in the other province. Either way, the game is not recognizing the rail link in these two provinces.
(2) Shelby, Indiana (contains the town of Columbus) can only recieve rail traffic from the immediate western province of Brown, IN. All attempted rail traffic, even from the seemingly connected provinces to the north, south, and east is diverted through the rail spur in Brown, IN.