I dont mean to but in guys as I have not driven with the H&R springs, but just for general set up of suspension components
The spring supports the weight of the car and engine and is matched to keep the car level front to back and side to side.
It also has a given compression rate which is relative to materials used and spring thickness.
The compression and rebound of the springs is further controled by the shock absorber ( bump and rebound )
To have bouncy springs whilst driving you have a mismatch on the rebound side of the shock absorber ie too soft!
This could be old shocks or just a total miss match of the springs and shocks!
I would suggest that a better option would be to buy a matched set of springs and dampers or uprate the shocks on your car to match the springs you have now.
To check your shocks push down at the front of the bonnet and observe the bounce as the car moves back upwards there should be no bounce and the shock should move smoothly with just one motion.
If they are worn there will be a few bounce's of the bonnet and it will be quite fast as the spring return is not under control.
One realy bad point of driving your car in this condition is that your braking abiltity is reduced should you need to do an emergency stop!
If your unsure about the test just pop into any tyre place and they will check the shocks usualy for free, but you dont have to use there services.
If the shocks prove ok I would suggest the springs are just too soft and may not match the corner weights of the car, has the right set of springs realy been fitted? They have given spring rates in KG and should match the corner weights of the vehicle that they are fitted too! between models the springs will look the same but will have differant ratings for weight differance of car models.
I hope this help's.
Gaz m