It seems the Notation is reflecting the (whatever it was) you scanned and posted as an image.
C#-A-C# is equal to F#-D-F# that you referenced once transposed.

Quote:
very top notes I hear in the original(in C piano) are G Gflat G A Gflat. The notation after transposing in the score are F# D F# etc...


Apparently the 'original' as you hear it doesn't match the score being used.

The transposing part seems correct. I listened to the mp3 snippet you sent me and I see how the notation may be deceiving because the accents can mislead you. Plus 'pad' type horns (and keys) add to the overall sound.

FWIW I can't hear the "G Gflat G A Gflat" sequence you referenced, in any key.

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