Just write in there that the "Castle In The Sky" has an incorrect English subtitle track and the rescored 5.1 audio track is missing, and you would like to have them rectify the problem.
For those of you who are doubting whether this will work, keep in mind that when Disney issued Pinocchio on Blu-Ray, buyers noticed some lines that were inexplicably missing from the audio track: (During the "Give a Little Whistle" song, Jiminy Cricket's "Right!" and later on, "Look out, Pinoke!") Disney complied, and they issued out replacements. Perhaps we can convince Disney to do the same with Castle in the Sky.