So the bahamut seem to be sealed by Allagan in the Dalamut (floating out side of earth or something?). Then he seek for someone to unseal him and somehow he posses The White Raven to turn him wanting to awakening Bahamut?

After that he got unleashed and destroy everything until got beaten by Phoenix, then it seem he disappeared into Aether?

1. Then why he is sleeping inside the binding coil of bahamut again?
2. Why are there so many binding coil of bahamut and they are far away from each other?
3. Is Binding coil of bahamut = parts of Dalamut that breaking into parts?
4. What is the original of this beast? is this an actual Dragon on earth? or it is always just aether?
5. What are we actually fighting against, during the coil of bahamut raid ? It is a fake bahamut? Bahamut remain mind? Another bahamut?
6. What is the purpose of us going into binding coil of bahamut, what do we gain from it?