It sounds like Eye-Fi Helper may be having trouble delivering one or more files in its queue. For each of the devices you have listed in Eye-Fi Center (other than My Activity), open the settings and make sure that Photos, Videos, and RAW (if available) are all enabled to save to your computer. http://support.eye.fi/cards/media/save-to-computer/
If you don't see some successful file deliveries and the issue persists, restart Eye-Fi Helper once more so it tries to complete any pending transfers.
If that still doesn't do the trick, please send us your your Eye-Fi Helper log files: Exit Eye-Fi Helper. Click your Windows Start button and search for "%APPDATA%" (without the quotes), which should open the folder
"C:\Users\<your username>\AppData\Roaming". Open the "Eye-Fi" folder. Look for any files named EyeFi, EyeFi.log or EyeFi.log.1, zip them all into an archive if you are able, and attach either the .zip file or those log files to an email to firstname.lastname@example.org
. Let us know the steps you've tried so far and link to this thread. The Helper log will hopefully explain what is going on.
Eye-Fi Customer Care