fixed bug that allowed an event writer to be included in the multiwriter more than once
fixed bug that allowed an event writer to be included in the multiwriter more than once

adamstruck/funnel,adamstruck/funnel,ohsu-comp-bio/funnel,ohsu-comp-bio/funnel,ohsu-comp-bio/funnel,ohsu-comp-bio/funnel,adamstruck/funnel,adamstruck/funnel