you problem is most likely the co's. period.
yes you probably have coil bind. my gc co set up does it ALL day. am i worried? not one bit. it is part of owning a car with co's. it sounds like you possibly would benefit from a stock strut (rebuilt or new) and a good set of lowering springs (blacks, yellows, even prodrives). as juggs has stated (so eliquently) co's are not for everyone. they make a ton of noise and most of the craptastics (which yours fall under) do NOTHING to improve the ride. they are way too stiff and way valved incorrectly for our insanely crappy roads here in the US.
i have read and re-read all the opinions here and on other boards. there is no such thing as the "perfect" coilover set up. not for regular street driving. if you are willing to make sacrafices (noises that might upset you, cluncks, ticks, "bong" from the coils binding, roung ride, "skipping" through rough turns, not to mention ruining your cv's) then co's are not that bad. BUT they need a TON of maintenance (sp). i remove my wheels and clean my GC co's bi-weekly. why? i live in a VERY dusty and dirty part of the US, and mine get dirty quickly. if i let the go, they start to make all sorts of noises.
am i worried about breaking a coil? no. they are high quality eibach springs. should you worry? i doubt it. but as i started the whole post, co's might not be for you. these cars are insanely fun, and with a better suspension, i guarentee you will love this car. you just bought the car with craptastic co's. try something else before you get too bummed on the car itself...
hope this helps somehow...
josh