Troubles updating firmware are usually because the drive isn't Master Boot Record (MBR), so the unit can't read the drive for the firmware update mode. I'm glad to hear you were able to update and things are working better now.
As an answer to a question that wasn't really asked, sometimes a firmware version number is skipped because it went through internal testing and was changed with another update before the release. Don't worry if not every single number is issued. ;)