Pacific Overtures original orchestrations

This is from the Music Theatre international website. Are these not the original orchestrations?
Instrumentation: Doublings:

BASS
CELLO
HARP
HORN 1 & 2
KEYBOARD 1 CELESTE, RMI
PERCUSSION 1 & 2 ANVIL, BELL TREE, BELLS, CHIMES, GONG, RACHET, SUZU, TAM-TAM, TEMPLE BLOCKS, TRIANGLE, TYMPANI, XYLOPHONE
REED 1 ALTO FLUTE, FLUTE, PICCOLO, RECORDER
REED 2 Bb CLARINET, Eb CLARINET, FLUTE, PICCOLO
REED 3 BASS CLARINET, CLARINET, FLUTE
REED 4 ENGLISH HORN, OBOE
REED 5 BASSOON, CLARINET
STAGE BAND 1/SHAMISEN BELL PLATE, BELLS, CLAPPERS, SHAMISEN, STAGE DRUM, TEMPLE BLOCKS, WOOD BLOCK, XYLOPHONE
STAGE BAND 2/PERCUSSION
TROMBONE
TRUMPET 1 & 2
VIOLA
VIOLIN A-B
Alternate Instrumentation: Doublings:

ALT:ERRATA OFF-BROADWAY VERS.
ALT:KEYBOARD
ALT:PERCUSSION BAMBOO WIND CHIMES, BELL TREE, BELLS, BONGO, CALF-HEADED DRUM, CASTANETS, CHINESE CYMBAL, CLAVE, COWBELL, FINGER CYMBAL, GLOCKENSPIEL, GONG, KIT, LOG DRUM, MARACAS, RACHET, ROTO TOM, SLAPSTICK, TAM-TAM, TAMBOURINE, TEMPLE BLOCKS, TRIANGLE, WIND CHIMES, WOOD BLOCK, XYLOPHONE, YARNS
ALT:PIANO/CELESTE CELESTE, PIANO
ALT:REED CLARINET, FLUTE, PICCOLO, RECORDER