Virtual Vault, Drag/Drop and "Store" Behaviour

As a follow up to https://www-secure.symantec.com/connect/forums/outlook-cache-mode-and-vault-cache-behaviour.

I have now set up a user pilot with Virtual Vault but no Vault Cache.
Changes made in the Exchange, Desktop policy, Vault Cache tab:

• Content Strategy to "do not store any items in the cahe" from our default "store all items"
• Uncheck "Synchronise Vault Cache" and "Vault Cache Properties"

A couple of immediate queries that I'm struggling with:

• Drag and drop item into the Virtual Vault. This item appears in the Virtual Vault (MDC file) but not in Archive Explorer.
• Using the Store menu button. The item appears in Archive Explorer but not in the Virtual Vault (MDC file).

Is the above expected?
I see no way to "Synchronise" manually?
Is there a schedule and where are the settings?
Any possible ways of addressing this?

Thanks