Handicap list for the World Club Class Gliding Championship. You'll note that non-club class gliders are included, such as LS-3, DG-500, Janus, PIK-20, etc.
I hesitated to separate club class from standard class, but the fact is that you can use club class gliders in standard class, in competition, so they still are standard class (and as you wrote : some are used in both classes), as they coply to the official standard class limitations. I see that you included the Swift into the standard class, I guess it was a mistake as it doesn't fit the way you separated clubs and standards.
The other issue would be that gliders such as the Ka-8b or K-23b are not considered as club class, usually, as their handicap is out of allowed range. You'll note that for the Worlds, Astir CS and Club Libelle are the lowest limit.
As far as the training two-seaters are concerned, if you take a look at the sporting code, you'll consider them as open class, even though they're not designed to race against the Nimbus 4 and ASW-22BL. But the Duo Discus and Nimbus 2 neither ! At least without handicaps, of course...
But well, it doesn't really matter, in fact, as it's just for list organization purposes
. As long as we got those gliders, I'm happy !!!
EDIT : I'll make a new thread for the classes disussion as it's off-topic here...