Are my Gaz gold rear dampers faulty??

[DavidsVTR]

Basically, when I bought my 106... it came with a full gaz gold setup.
The rear end sat at a perfect height at the time....
The car has been sat a while now and I have noticed the rear end is allmost sat on it's arse?!

Is my axle knackered or my dampers??

I've had a damper off.... and I can push it in and pull it out easily enough.
Also, it will stiffen up fine when I adjust the knob.

But when I push the damper in, it doesn't rebound back out by itself. (I have to pull it out manually..)
Is this normal.. or are they knackered?

Thanks in advance