Anthony,
That's an absolutely stellar question! I've been working on finding this out for you.
In addition to that in the event that it is not a function of its operation, I have filed a BURT on behalf of this request to get this feature supported in the future.
I'll keep you informed of it as it progresses.
One thing - is if you're looking at it from the long-term ability to manage these snapvault relationships, you should check into the Backup Manager component of Operations Manager. This can greatly improve your management of snapvaults and their relationship.
Thanks, and I'll let you know what I find out on the create_time vs ordinal front.
Christopher