DTTG not syncing on iPhone 4S

I’ve had DTTG syncing fine on my iPad 2 but it isn’t completing a sync at all on my iPhone 4S. In the process, it also seems to have renamed one of my folders …“Placeholder”… Is there a way to reset DTTG on my iPhone to get it to sync properly? Anything I should be doing on my Mac? There’s no problem syncing 2 devices, is there?

I just got this same problem earlier. It is working fine with iPad indeed, but when I used it with my iPhone 4 (running the latest iOS), something went wrong. I will reset everything and see if it helps.