I got confused on that for a bit. Now it doesn't. I noticed on Impact drums it lays tracks for individual drums. But I kept a eye on added tracks. And it had to be me. Cause you can erase them just to the left of the sliders. Lighter font ones can be erased. Deleted. Etc. But since keeping a eye on that. I haven't noticed. I accidentally would add buss or side chains before. Now I know a little more.