Yeah - they sound like Koni's. You obviously didnt get the little tool to adjust them though.
There is another thread around asking how easy it is to adjust them, and all the details are in there. I made a comment that it takes longer to check your oil than adjust your shocks (the front ones anyway) The rear ones take a little longer to do, cos you have to fold the seats down and take the cover away to get to them.
Try stiffening them up, and if you cant notice any difference, try new springs.