Rear-end control

[lazy]

I have installed a bullitt suspension kit with swaybars, shocks, struts,and springs. I also added mm upper and lower control arms. I notice that when I take a corner at a decent speed, if there is a tiny bump in the road it seems to lift my rearend off the ground and set it back down. Is this typical of mustangs or do I have something wrong with my setup. I only have my WS6 to compare to.....and that isn't even an issue. TIA