Adding to trogggy 's comments, I'd try to do a proper (no quick format) re-format those USB-sticks on Your computer and try again.
If thet doesn't do any difference I'm agreeing with trogggy regarding value of these sticks...
Maybe You could borrow one/two spare USB-sticks from someone and try with these?
I'm using 16/32/64GB USB-sticks across my different LE computers and various RPi installations. All formatted with FAT32 or NTFS and these works without any issues.