Ok, I think the best way to fix this is either if you pop in freenode #ubuntuone and ask for either of the following people:
- mandel (that would be me)
We probably will need to check your logs to ensure what is going on and see if the changes in your machine where indeed notified to the sync process. An other way to move forward is going on is to send a but in launchpad (https://bugs.launchpad.net/ubuntuone-client) and attach the all the files you can find in:
The best way is to create a zip with all the different logs and attach them to the bug.
The above is for Windows 7 if you have any other version, please di file the bug and state that you do not know where to find the logs. We also need the name/path of the file you changed, otherwise is kind of hard. If you have confidential info or do not want people to know about your system do report a private bug.
Sorry I could not answer more about this, but with no logs we have no idea :(