A few things to consider.

iSync only syncs documents if:

1 - There are changes in the local project or in the central document.

Or

2 - If it is enabled the option: "Save / Sync even if there are no changes" 

Has anyone run into the issue that isync is only syncing the first project you open. I have my sync time set to 30 minutes, but I have projects that have not sunc for over 12 hours.

Maybe it has something to do with the pause and there is never a pause long enough for it to make it down the list, so it just starts over at the top??

But my computer was sitting idle so that doesnt seem to make sense.