Campaign Map Border Error east of Michigan
East of Michigan is a finger of Canadian territory that juts southwest towards the US. According to the region border lines drawn on the campaign map, there is a portion of this finger that should belong to the Michigan Territory. Howver, if you try to cross the land bridge from Michigan to this finger of land, you get a Declare War? message, indicating that the game considers ALL of this finger belongs to Upper Canada. I'm not sure which part is the mistake (the border marker or the ownership of the tip of this finger of land). The border line seems most likely to be the error, since the Great Lakes seem like they would be a rational border.

Missing Land Bridge?
Given the distance across water with the 3 other land bridges attached to or very near Michigan Territory, it seems like there really should be one north between Michigan Territory and Huron Territory, just south of Ft. Sault Ste. Marie.