you need to use IgnoreEVDates or wait for the items to be eligible again.
Because you restored them the modified date changes and EV knows they were restored and is going to key of that date instead of send/recieve.
To allow Enterprise Vault to archive the restored items during the next archiving run, create the REG_DWORD IgnoreEVDates in HKEY_LOCAL_MACHINE\SOFTWARE\KVS\Enterprise Vault\Agent. Set the value of IgnoreEVDates to 3 (decimal), then restart the archiving task.
Do a run now on your mailbox and then the items will be archived. After it is done delete the key as it is not best practice to leave it in place.
Regards,