I assume you sorted this out but posting this since I hate unresolved problems when I google for them myself, just in case other people have this issue.
I had this too with a 16GB Kingston Micro SD HC, and the only other micro SD I had was the 8GB one in my girlfriend's phone. This is partitioned to have a 4GB EXT4 partition and a 4GB FAT32 partition. I didn't even format or change anything, I copied over the blue card files onto the FAT32 partition, still with all the other stuff there, and it worked fine.
So it was probably a problem with all your micro SD cards, unfortunately.