I've contacted support this morning and they asked for a log, by the time I got the instructions to generate the log and try to retrieve one, the download and firmware update install process worked as it should have.
Both cards we where having issues with have flawlessly updated without me doing more than what I did yesterday - repeatedly on multiple workstations. VivianM's comment likely hit the nail on the head as to the issue itself (Vivian your name is very dear too me, as it was my Mom's and yesterday she would have been 100 yrs old - So, Happy birthday Mom !!! and all the best to you VivianM and great "gut" instincts).
Anyone having this general issue should try again and if still having the problems; please send your card log, per supports instructions below, to them so they can help you with your specific need.
You can start a ticket from inside eye-fi helper icon; the same place below you grab the eye-fi card log, under "report a problem".
Thank you for contacting Eye-Fi Customer Care.
Please provide me with the following information so that I may troubleshoot your issue further:
Eye-Fi card log recovery process:
1. Insert the Eye-Fi card into the USB card reader and into your computer
2. Click on the Eye-Fi Helper icon in the Apple Menu Bar or in the Windows Task Bar
3. Select "Get Eye-Fi card Log..." from the menu. You may have to wait several seconds, but, in a moment, you will be asked where to save the Eye-Fi card log file
4. Save the Eye-Fi card.log file to your computer hard drive and reply to this e-mail with your log file attached
I look forward to your reply and helping resolve your problem.
Eye-Fi Customer Care
Best to you all,