Duplicate EV hidden views could be created in Domino mailbox databases provisioned by Enterprise Vault as shown below
The EV hidden views with multiple instances are usually:
EV26C5E2CCF2B9267C.EligibleItemsbyAge and EV26C5E2CCF2B9267C.EligibleItemsbySize
This behavior does not seem to bring any side effects to the Domino Mailbox Archiving, however cleaning the duplicate views is desirable and can be obtained by zapping the enterprise vault profile document from the domino mailboxes.
This is an example of a 'zapping' execution:
EvLotusDominoProfileDocTool.exe mailserver/organization mail\testuser.nsf archiving.id <password> zap
When the ZAP has been completed it is necessary to synchronize the Domino Mailbox(es) from the provisioning task or execute a provisioning task.
Since the root cause has not been identified yet the ZAP of the mailboxes is not a definitive solution, this is only a temporary workaround. If the duplication of these views keeps on re-occurring very often please contact Support to investigate it further.
This issue has been addressed in the following release:
Enterprise Vault 10.0.2 - Release Details
Enterprise Vault 9.0.5 - Release Details