.
As you see there are lots of ways to control the substyles.

Take a look at the menu that you get when you click "Song settings."

"Vary style in middle choruses" is what causes the variations you mentioned in your first post.

Try unchecking it and see what you get.

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Flatfoot sez: Call me when 'Talent-in-a-Box' is ready to ship! -- [8{>

Got some tunes on You Tube:
http://www.youtube.com/user/flatfoot50
.
My BiaB lesson site:
http://jdwolfe0.wixsite.com/learnbiab