It happens, annoying but it happens. I admit this one was more annoying than most as the seller very clearly listed one thing and shipped a no holds barred different reproduction, different sizes, everything so I have a feeling this one was not an accident. At least I got my money back without a fight, just wasted time.
I think one in every four transactions on FleaBay goes without a hitch of some sort be it seller descriptions, poor shipping, etc. I do not buy much from there any more as a result, that along with the infrequency of decent deals on anything I want these days.