Conversation so far:
who did the choreography for Carousel the musical?
Agnes de Mille did the choreography for Carousel the musical
what is musical treatment in the Carousel musical article?
The Carousel cast album of the 1945 Broadway production was issued on 78s, and the score was significantly cut—as was the 1950 London cast recording.
why was the Carousel musical score signficantly cut?
what else is notable about the Carousel soundtack?
A number of Carousel soundtrack songs were cut for the 1956 film
which numbers were deleted for the 1956 film of Carousel the musical?
two of the deleted numbers from Carousel had been recorded and were ultimately retained on the soundtrack album.

Question: why were they retained?
Self-contained rewrite: why were two of the deleted numbers that had been recorded ultimately retained on the Carousel musical soundtrack album?