SCRIBE Replication service - some fields don't synch when updated via Import to CRM

Have a custom date field on the opportunity entity that updates just fine when manually entered and replicates down every 30 mins. The opportunity was moved to Closed Won and we discovered we needed to update this custom date field a few days later - so we updated using Dynamics Import and all of the records that we did this for appear to have taken the change in Dynamics - however SCRIBE Replication does not reflect this changed date field. Is this known behavior on a closed Won record or is there something else that needs to occur for SCRIBE Replication service to trigger the synchronization?