Yes, of course there is a reason behind it! Depending on exactly how the music ends up being condensed, you may need to the playing techniques from the source instruments to be shown or hidden differently from the source, uncondensed music. In general, many properties can be set independently between the condensed and uncondensed music. We know that users would like the ability to propagate properties from uncondensed to condensed music, and vice versa, but that is not currently possible.