All those buildings are as close as they get and should block units from rowing into the beach, they did that before, something chanced during last updates(?) around last sailing event. Now they come, from every tiny hole. http://aijaa.com/DgMlIU
Yes, during the last update the ability for troops to walk around all sides of fort and ships was granted.
Fixed as in the troops now follow a path Midoki intended them to. In the past some troops would go around the ship (bombers for one) but the others would walk clear across the base getting toasted. Also it helps eliminate the notorious wedge base that everyone has.