[V8] E-brake functionality

[Seamus O'Carey]

How should the e-brake lever on the rear calipers behave when you move it?

The reason I ask is that the e-brake seems to be stuck ON in the silver car
so I decided to swap the brakes from the pearl car onto it (I put new rear
brakes on the pearl right after I bought it just over a year ago).  The
problem is that when I pulled the brakes off the pearl I noticed that the
left rear rotor appears to have been getting pretty hot.  It's got
blue/purple discoloration on it (which I'm hoping doesn't mean that it's
warped), so I'm guessing the pads had been dragging on that side

I suspect the dragging was caused by the e-brake mechanism, so I started
playing with them.  I noticed that when I moved the e-brake lever on the
RIGHT caliper back and forth the piston would move in and out just a
little.  When I did the same thing on the left caliper the piston just kept
inching outward so that if I'd continued to do it it would eventually push
the piston all the way out (which is what it was like when I bought the car
just over a year ago).

So I think the LEFT caliper is not working correctly, but I'm wondering if
anyone knows if it's possible to fix it.  Does it just need to be cleaned
and lubed somehow, or is it pretty much screwed?  The big problem is that
I'm pretty sure the LEFT caliper on the silver car is also doing the same
thing, which would mean that I have two broken left calipers and two working
right calipers, which doesn't really help me at all.

Seamus