Sorry for the late reply I didn't get notice of yours. Its not your map, it seems to have resolved itself with it more than likely being giants as it started after the 1.5 update. The issue was single and multi both, but it seems to have gotten itself right. I love this map I am almost 200 hrs into it and its become my favorite.
The update definitely screwed some thing up no doubt. I was playing yesterday and was having issues with renting the train, Had restarted my save game at one point and the train worked fine lol Hopefully Giants will get their ducks in a row here soon and get all these issues resolved. Glad you are liking the map it was just a quick edit of the west side of the map and I had intentions of going around the whole map but I've been really busy lately and haven't had the time.