What's up with Battle of Actium?

First of all - good god! could they have made a map harder on the eyes than this one?
Okay, so i own G. Octavius boat, and I attack M. Antonius boat and conquer it from yellow player. It goes down to one army, that now becomes neutral? wtf? and I kept hitting the nuetral, and it kept telling me I've annihilated neutral player... yet someone it just stays neutral and i cannot move into that territory....
I've read over and over and over the instructions on the map, and I just don't get it! Neither does anyone else in the game.
Help?!
Okay, so i own G. Octavius boat, and I attack M. Antonius boat and conquer it from yellow player. It goes down to one army, that now becomes neutral? wtf? and I kept hitting the nuetral, and it kept telling me I've annihilated neutral player... yet someone it just stays neutral and i cannot move into that territory....
I've read over and over and over the instructions on the map, and I just don't get it! Neither does anyone else in the game.
Help?!