It’s a temptation to gather huge style collections for these machines, but you are finding the downside. These collections inevitably contain many duplicates, many faulty or poor styles, and many preset styles that have only been re- named. The result is that it’s a lot of work to sort good from bad, and no easy way to do that. And even if you do cull the out and out bad ones , it’s still not always easy to find a suitable style for a specific song among a huge collection.
I gave up on this years ago, as I found it a huge waste of time. I work around pretty much just what is in the presets.
Mike