I remember reading the thread that mentioned Synergistic cables build quality. I'm not a big fan of their cables overall, but I have tried them in my system several times on loan from The Cable Company. To me they looked like they were very well made. Of course, I could be wrong since I couldn't see inside the cable to judge its build quality.
That said, I have a couple of ideas regarding this. First, the dealer may have re-terminated the cables themselves. I've seen this before and its fairly common. Its very tempting for a dealer that has some very long runs that they can't get rid of for some reason, to cut them into sizes that will sell. Second, most of the bigger cable companies have very good warranties. I know my Audioquest cables are guaranteed for life. There's a very good chance that if the cables were sent back to Synergistic, they would have been repaired under warranty.
I'm not saying that its definitely the case here. Its just something to consider. Like others have stated, they could very well be poorly made.