[Tolwyn]

Nope. I did it again:
http://files.tolwyn.com/engine_weirdness2.ntrk

DISABLE manual view so you can watch what I'm showing.

1. Deselect both engines
2. Show that both are deselected
3. Select engine 1
4. Start engine 1
5. Deslect engine 1
6. Select engine 2
7. Start engine 2
8. Select both engines, bring throttle to idle

This is "normal starting position"

1. DESELECT engine 1 (conversely, enable only engine 2)
2. Bring engine 2 to idle
3. Feather engine 2
4. Shutdown engine 2
5. DESELECT engine 2 (we don't need it anymore)
6. SELECT engine 1
7. Show that engine 1 is selected (throttle up, then throttle down, etc.)
8. Bring engine 1 to 70% power; note that all is fine.
9. SIMPLY DESELECT engine 1 (essentially NO engines are selected at this point)
10. Watch the RPMs climb in engine 1
11. Repeat tests. You can easily get engine 1 to fail by simply deselecting it and not changing any other parameters.