Ouch! That sucks... It's bizarre how they get packaging errors, but hey... it happens sometimes. They should have just cross-shipped the actually/correct part... Waiting sucks all the time 
When i got my kit they sent the wrong front left spring in the correct box, instructions, rear springs etc. i have been trying to get the correct one from them for almost 2 weeks now. i am just really pissed and sick of waiting for stuff from all the way over there to get to florida. what a pain in the ....
i got the springs from a dealer who is supplied by keystone. from my understanding they are one of the largest distributors of reibach springs nationwide. back when i was a kid and worked at the local "parts plus" we got practically everything from keystone, i remember cause i had to put the truck up twice a week. my dealer told me that i had to work with eibach directly if i wanted to get the one spring swapped or i would ahve to ship the springs back and go that route. i figured that dealing with them directly was the was to go since i didnt know if there were other misboxed springs in keystones warehouse, and with my luck i would have gotten another one like that. so i have been dealing directly with eibach techsupport and customer service ever since.Wow, total drag!Sorry you are having such a terrible experience. And this is Eibach directly? They should know better :\