Dude, I don't want to sound harsh and I'm on your side.......
I've posted about buying equipment through the mail-I'd say the odds of it being not what you want are 50%. Instruments or amps, expect a high chance of returning it.
That said, good for GC for getting your money back-if anything, while there is no "blame" on your part, let this serve as a lesson. There will also be instances when USPS will "adjust" your order before it even gets to you.
I've driven hundreds of miles to see and try out equipment rather than order it throught the mail, or trust the postal services not to destroy it, but hey, that's me.
Good luck, and again, kudos to GC for getting your money back quickly.