--allow_multiple_clients & condor backfill fetch-work

Dear All:

We're converting from BOINC backfill on our condor cluster to fetch-work. boinc --allow_multiple_clients allows 2 boinc clients to run, both schedule and download, but one always get detached (yet runs the tasks anyway ...); other runs ok. Do Einstein servers need to be configured to allow multiple clients per host? Any info would be appreciated.