I can't confirm it's two floors. I can only confirm Gluttony suggested I would be surprised by the number of floors that are left, in a disconcerting manner that suggested something more sinister than sleep quarters. I surmised it was one less rather than one more because Yuel noticed the ship had only seven rings. I don't think the "floors" include the ground floor or top floor - only the floors that are specific to a particular Avatar.
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