Oracle Data Pump Import with running advanced replication
Basically Advanced Replication works with materialized views, materialized view logs and triggers.
To replicate data from one side to another, you need to have INSERT, UPDATE or DELETE statements to make the replication mechanism recognize that there is new/changed data. When you import data with direct path method you skip all this stuff. This means you need conventional path method to import data.

DataPump chooses the method by itself on a set of conditions. These conditions can be found here: http://docs.oracle.com/cd/E11882_01/server.112/e22490/dp_overview.htm#SUTIL804

I'm not 100% sure which method is being used in your case but i doubt that it is conventional path.

Oracle does not tell how to force conventional path method but you could try to import the data with the old imp utility. When the export is done with DIRECT=N the imp should be done in conventional method.

Maybe someone else has experiences with Advanced Replication and DataPump. My experiences are limited since Oracle pushes Golden Gate as the future replication technology.