Andrew, I purchased all the bonus sets in the past and they are showing up as N/A.
Did the rebuild both fast and slow multiple times. Support has my email about this.
You should start a new thread about this, probably in either the Band-in-a-Box Mac or Windows forum depending on which platform you are on.
Just for your information, slow rebuild is only if you want the program to search for "third party" (no -PG Music styles). Also, you'd need to clarify if it is showing up as [N/A], or [RT N/A], and an example style, and we could go from there.