Help needed with User Synchronization plugin

Hello there,
I'm developing two user membership sites that I would like to have synced user databases. That's why I purchased the User Synchronization plugin. However, I have two issues/questions about it's capabilities.

1. Is there any way that the user syncing goes both ways? I want the users that register on Site 1 to be automatically synced to Site 2, but I also want users that register on Site 2 to be automatically synced to Site 1. Is there any way to achieve this ?

2. When I update an existing users meta data on my master site via the admin panel, for a user that was already synced to the slave site , I can see that the users meta data get's updated instantly on the slave site as well. However, when I do the update via php code with the function update_user_meta, that change does NOT go trough to the slave site. Is there any way to update user meta data via php code on the master site, and get that synced to the slave site without using the wp admin area?

Thanks in advance,
Ivan