I posted this a while ago but I have had a few get lost (and it seems a very easy fix) so I post again in case it never got through. If it did and you simply have not gotten to it, I apologize.

The problem is when you enter the Seantryn Bay, you are doing so from the southEAST corner of the Aryth ocean. But when you leave the Seantryn Bay and go back to the Aryth, you are standing on the southWEST corner of the Aryth, and one step west puts you on the Western Aryth. These, of course, are mutually exclusive.