Distributed Builds Always Use Same Agent

Hello --

I am trying to set up Continuum 1.3.4 to run certain builds on SunOS machines and other builds on Linux machines.  However, when I enable Distributed Builds, all builds seem to run on the first enabled build agent.  My distributed builds configuration looks like:

Build Definition: "SunOS 9 Install"
    Environment: "SunOS 9 Builds"
        Build Agent Group: "SunOS 9 Agents"
            Build Agent: "BldSun1" = http://bldsun1:8181/continuum-buildagent/xmlrpc

Build Definition: "Linux RH Install"
    Environment: "Linux RH Builds"
        Build Agent Group: "Linux RH Agents"
            Build Agent: "BldLnx1" = http://bldlnx1:8181/continuum-buildagent/xmlrpc

If both agents are enabled, then both build definitions always run on the SunOS agent (BldSun1).  If I disable that agent, then both build definitions always run on the Linux agent (BldLnx1).

Is this the same problem as described in CONTINUUM-2349?

Also, http://continuum.apache.org/docs/1.3.4/installation/build-agent.html says:

  "Note that all of your agents need to be identical, as there is no way to
  control which agent Continuum chooses.."

It's not clear to me whether this means all the agents in a build agent group (seems most likely), or all the agents running on a host, or all agents known to a master.  Can someone please clarify?

-- Thanks,
-- George Snyder