The new TF coils are a little stiffer then the factory springs so it sounds like the factory shocks cannot control the bounce. Once you upgrade to a better shock you should be fine. The ride will still be a bit stiff but won't bounce.
For those folks not intending on installing heavy bumpers and winches I usually suggest the TF BB to retain factory ride.
08 Black and Khaki JK Sahara Unlimited, Dual Tops, MyGig, Tow pkg, Trax-Lok Rear Diff,
Mods -- 3.5" Rock Krawler front springs, 2.5 TerraFlex BB, PitBull Rockers 35x12.50x17 on BlackRock Vipers, AEV Premium Bumper,