[Edi]

Yup, found that out when I got bored looking around the map and guessing. Not blaming you for anything, but it's working as it should. Some of the things are a little bit counter-intuitive, such as the border between Trollmoors and northern High Forest. It's also intended, because it's essentially just a dash across the road without engaging province defenses on the way.

I learned a lot of stuff from making the Dom2 Faerun maps, one of which was how to deal with the islands. This map is basically just the latest iteration. It's just that often some stuff is left in that nees to be ironed out later.