l know this is old but there is something amiss, l did not read all of this topic but :

the portrait of messenger with the title " In The Garden Sleeps A Messenger" reffers to both :
Sleeping SeeDs awaiting their final battle with the "Evil" sorceress and
Sorceress Edea being controlled by Ultimecia, this refference is of Edea using the SeeD Garden and being unable to do anything like a person sleeping deeply.

the rest of the refferences seems to be correct, should you want the full info you should contact directly with Sqare - Enix. they will answer most of your questions :]