Gaz Gold - Need some advice/help

Ive fitted a new set of Gaz Gold coilovers this weekend.

The kit went on fine, fitted lovely, no issues. I went for a test drive and i noticed a clunking from the rear over a few bumps down the road.

Turned around and came back and found that the passenger rear spring is not under load when sat on all 4 wheels. I can move the spring.

I wouldn't think the kit is incorrect as i went with Kam Racing and Gaz recommendation. But could it be that the car is currently unbalanced?

It seems my front drivers coilover ride height is 3cm higher than the passenger but set lower on the l damper. Could this be causing a problem on the passenger rear spring?

Any advice or setup tips would be really appreciated. Ill message Gaz on Tuesday and see if they can advise also.

Thanks