Hi Lee,
unless I'm misunderstanding.

I lowered accomp. right down so you can hear clarinet doesn't change thru variations.

the last loud sound you hear is in vari 4 after I replay a note. OTS fo vari 4 kicks in. It is far louder, but that's the way the sounds for that ots are set up.

Don't know if you've noticed but the variations get busier and louder 1 to 4. so do the sounds for ots.

If you go to mixer panel while pressing the variations you'll see the volumes changing.