Integration with TeamCity - Double VCS Change entries

I have a pilot project where I have installed Hub/TeamCity/YouTrack/Upsource all one one machine and done my best to get them integrated with one another.

In TeamCity I have a simply build chain of Maven Projects (A->B->C) against three different SVN trunks each with its own VCS trigger. TeamCity is configured against the external hub server for authentication.

The Hub Project is linked with both Youtrack and Upsource (against the 3 repositories).

I have a ticket in YouTrack (lets say FOO-1) and  if I check in source-code to project A with the comment text ("FOO-1 did something") the following events occur:

    * Upsource picks up the change with the next refresh

    * The TeamCity server starts its build chain eventually

    *  The YouTrack VCS Change tab for FOO-1 gets  updated ... but twice.

The VCS Change block gets double entries for the single check-in.

     * The first edit is from teamcity which has a resources link with the version number and has a drop-down list containing 3 identical links back to TeamCity

     * The second edit has a "metadata" link pointing back to Upsource - this link also tries to direct to a revision number but fails in Upsource with the message "Revison <project-name>-<revision number> not found."

Any idea why I am getting double entries in my YouTrack ticket?  Have I overconfigured it?