Because the updates are propagated asynchronously to the Publisher, the same data may have been updated by the Publisher or by another Subscriber and conflicts can occur when applying the updates.
Conflicts are detected and resolved according to a conflict resolution policy that is set when creating the publication.
To paraphrase the quoted block, with immediate update the only guarantee is that the commit is immediately updated to the publisher.
The changes will be sent to the other subscribers in due course.
This topic describes the deprecated Replication features that are still available in SQL Server 2012.