That can't be a Super Cub. It's the wrong colour - Super Cubs are yellow!
Oh yes, and if it was you flying in the first picture, the tail-wind certainly won't help your landings!
There is no reason not to wheel-land a PA18, especially with an instructor behind you. In fact, it's the only safe way of getting it down in a descent, gusty crosswing, in my experience.
I wonder about your example of bouncing then veering across the runway... depending on how you bounced, is it possible that the bounce induced some roll or yaw, which caused you to not be straight on your second landing? I'd guess that, in recovering from the bounce, you may not have noticed the drift or yaw. I don't know, I'm just guessing here.
I've never flown any of the other types you've listed. The closest is my S2C vs your S2A, but since I only have an hour on type, I don't know it well enough to compare to the PA18. But I have been pax in a Cap10 a couple of times (thanks FNG!), and, if I remember correctly, the Cap10 doesn't land with the stick full-back. I'd try to concentrate on that the next time you fly.
The bungees are easy enough to check - I think it's about 3 screws which hold the covers on. But I don't think you'd get much of a mechanical bounce unless you were dropping in from quite high. I'd have thought that the aerodynamic bounce from landing main-wheels first is far more likely. When I mentioned mechanical problems, I was thinking more along the lines of the tail-wheel linkage not giving you enough tail-wheel authority. But, now I think about it, immediately after landing you'll have enough aerodynamic rudder control that tail-wheel authority isn't all that important, so scrap that one!
FFF
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