Index unique column is not being enforced outside of editor.

I have a plugin that adds a record to the deliveries_audit_log. I have it checked as unique and indexed. It seems to me that it should make the key unique. It doesn't.

ZenDB does not appear to support the REPLACE command, which can be used as an alternative to INSERT. Right now, we need to do a get or query, then insert for each record. 

Also would views and stored procedurs be possible?