You've created New Employees via integration and in your feed the Update XYZ (XYZ represents Employee Name): Name updated to XYZ by ABC (ABC represents your Employee Name).
When the Employee XYZ was created the feed got generated.
Whether user is created in manually in SAP Hybris Cloud For Customer or by replication, the feed will be updated.
As the replication was initilized by the user ABC, the Feed shows the message "XYZ: Name updated to XYZ by ABC", informing that the change was performed by the user ABC.
This is the expected system behavior.
KBA , SRD-CC-FED , Feeds , How To