Gee, buckeye... You got exacly half as many as I do.
But, you've got about the same number I've done with a compound. Of the others, 4 were done with a recurve and 6 with a longbow.
My favorite one is one I did with a longbow, checking to see how my point-on distance would change if I shot with a 2219 vs a cedar shaft. Turned out, there was no difference. The cedar shaft is imbedded in the arse end of the 2219. Distance was 45 yards. I think cedar into aluminum robinhoods are pretty rare, since I've never seen another like it.
As far as I'm concerned, it doesn't matter who put the first arrow in the target. If you aim at the arrow and your arrow sticks in it, that's a robinhood. I could give a rip whether or not it meets someone else's criteria of a 'true' robinhood.