Navigate to the recovery point tab in the agent summary screen for a protected server and locate a recovery point that includes all of the protected volumes you want included in the virtual standby / export. Right click that recovery point with all the volumes included and then click the create virtual standby option and continue to the volumes option. It should now show all the volumes correctly that you want included in the export and should create the virtual standby correctly.
***Even if you use the initial base image that includes all protected volumes the export be created in the state that the server was in at the time the base image completed. The core will then update the VM using the most recent data as new recovery points are taken and the updates are made available to the export process***