Fall and summer? In OoA? I didn't really get what you meant.
It does show the ocean getting smaller after the flood. Look at the east-most part of the maps.
In this thread i was able to prove the connections between all games geographically. You can have a good idea on the distance between...
Zelda DS was initially planned to be a 4th FS subseries game. Later they dropped that idea to make PH.
Many people suppose that it would be a sequel to TMC telling the story of the FS BS (about Vaati kidnapping maidens and stuff)...