User Sync - first time install doesn't seem to work

I installed user sync on all wp sites I wanted to sync and it doesn't seem to work. I'm sure it's user error... but can't figure it out. It says it synched ok, but none of the sites seem to have any of the users synchronized...they are all still in their own sites.

All wordpress installs are running the same verson. I activated the master and then connected all sub sites and they all said they had connected and synchronized fine.

They are all on the same domain, is that ok? - master - sub - sub - sub