Springs sagging after 2.5 years???

So I fitted Bearmach std height Hd springs to the front of my fender 110 just over two and a half years......decided to replace the rears as they were tired..........so Friday there fitted Flatdog Std HD1's, looked great but now my motor leans towards the NS front, the bearmachs were not handed but the dogs were and were fitted correctly........few questions, can springs sag that quickly? do I need new springs or any other ideas?

Oh and on the test run, I drove over a speed bump at the top of my street going 5-10mph and there was a bang, checked everything and seems fine....confused

Did you just replace springs or also do the shockers?I fitted bearmach heavy duty back and front with standard height procomp shocks...sits nice and level .

I suppose the question is how far out are they? if it's just a few millimetres I doubt if it would make a big difference. If it's a noticeable lean then it may need attention. On the Gwyn Lewis website there are packers and spacers like this
4 x Land Rover Spring Spacers 6mm gwynlewis4x4 rear spring trimmer packs | eBay
so it's obviously a common problem that people want solutions for.
Yes, new suspension makes weird noises. I was quite disturbed about mine initially. After a bit of driving around it quietens down.

One thing I just noticed whilst clearing up this weekend. Old shocks taken off when I put new Pro-comps on .. the damping was useless under compression, but 'normal' under tension, in other words, hit a bump and it compresses quickly but the recovery time is relatively much longer. I would guess that when stood this translates to the shock not providing the support that they normally do and possibly sagging.

My suspention is 18 months old, it leans where ever I park it and when I put my foot down it leans like a musle car, I have a very soft challenge set up

My springs are bearmach +2" dampers are teraferma + 5"