Compare the tracks that show up under each Genre listing. Are they the same? This may or may not be the case for you but if the Genre spelling or spacing is different then Prime (or any other software for that matter) will see them as seperate Genres.
Example: Engine Prime will see FOUR different Genres from the examples below
Be sure that the capitalization, spacing, etc. is consistent.
If you made any changes to tracks that have already been exported fo to MCX, you will have to:
- Remove those tracks from your collecton
- Run Export so that the track(s) old data will be remove entirely from you collection
- Add those tracks back to your collection
- Run Export again so that the changes will reflect