Help confirm C-One springs/shocks install?

[sacklunchz]

Hey all,
I just installed C-One springs and shocks on my 07 yaris sedan.

The install went fine, I think. But I'm a bit nervous that
a) the springs seem fine on the lift with the car in the air (here), but once lowered seem quite compressed (here).
b) the top mount plate/screw seems slightly raised (here). Unlike the stock shocks with the allen-key, the C-One shocks (KYB's apparently) have these plastic tips in the tops of the bolts (which are maybe used to adjust the stiffness? I need to check with C-One on this). I tightened the top nut as much as possible before the shaft started spinning. Is this okay? Or is there a way I need to hold the shaft while tightening the nut (there doesn't seem to be an alley-key hole like the stock shocks)?

I'm pretty confident I installed the proper pieces, but perhaps I missed something? I took the car for a quick drive and it seems to drive fine.

Help?? Thanks ya'll :)