Speaking of the Melodist . . .

I notice there are 1,753 Styles.
However, there are only 217 Melody Styles.
So, regardless, of what Style one's song is in, if one wants BiaB to generate a melody, the song has to be in one of those 217 Styles.

For example, I had a song in a heavy metal style.
I tried a melody called "Rock 12 String Guitar."
And the memo said "Rock 12 String Guitar * autoloads C_EAGLES.STY."
So the song automatically goes to the C_EAGLES style.
Correct?

Another thing I noticed.
The first pass through ("chorus") the melody sort of sounded like a 12-string guitar (not really).
But the second time through the sound changed to something sounding a little like a xylophone.

I'm lost. What's happening?