Hmm didnt know it had to be connected to power and locked for this sync to take place? Is there something I should do to enable the sync or will it do this on its own?
I dont have that many photos of people / faces but those that I have seemed to have synced, a few might be missing but most are there.
all that you should need to do for it to check if there are any photos it still needs to add, is to click on the People album, leave it as is, then lock your phone while connected to power.