Just to let you know, I've taken to testing ALL my micro SDHC cards because there are a lot of forgeries out there. I've gotten forged cards from both eBay and Amazon, and even on Listia. Usually they are actually 8 or 16GB cards reformatted to APPEAR to be 32 or 64GB cards.
And whoever you are, it sucks to be stuck with these mislabeled cards.