[bbsc]

but my mistake was I stuck a 2GB SD card in to backup the firmware to that I had not checked and it only 512MB free and was also formatted as MSDOS/FAT16 not sure if that part matters.

so when I ran the #6 "Install/Update Custom coreboto firmware", I got an error message that there was not enough disk space for the firmware backup and that writing the backup firmware had failed. Pretty sure the installer then said to press return to go to main menu, which I did, but it did not go back to the main menu, instead it just overwrote the original firmware with the new firmware.

that sounds like a bug in the script I need to fix - I'll look into it.

It more likely sounds like this SD card was previously used for Open/LibleElec installation and so was splitted to several partitions.
Just my guess.