I have most passwords stored in Firefox, and sync them between computers and my phone, and it works great. Recently I decided to move a certain few passwords elsewhere, and deleted them from Firefox on one computer. Days later, they still appear on most if not all of my other devices, even though sync doesn't report any errors. This is a bigger problem than it might appear at first glance: since I might have updated a password on another computer I can't choose just one that has the correct data and reinitialize syncing there.