>>>I sorted the column low to high and found that the sequences starts at 361 and end at 853.

There are a total of 271 RealTracks available. We have "variations" of them as well, for example a bluesy variation, or a substyle variation. So when you see a list from 361 to 853, that's almost 500, so aout half of those are variations. There's a checkbox to not inlcude the variations.
As for counting the RealTracks, the quickest way would be to highlight all the folders in the RealTracks folder (in Explorer), and see how many folders it is.
Odds are you'll have about 271


Have Fun!
Peter Gannon
PG Music Inc.