I'm afraid I can't answer your direct question, but I agree with you about DV. It's apparently based on some package they've imported from a Canadian company without properly understanding how it works. It's much more geared towards robust commercial use than towards ease of use in the consumer market.
One major issue I discovered was when I recently downgraded from BT Broadband Option 3 to Option 2. Option 3 comes with the Autobackup package, whereas with Option 2 it's a few £ a month. I'd used it to back up a few files, but when I downgraded it ceased to work. That was OK, because I knew about it and was expecting it. However, what isn't made clear is that without it you can't get at, or even delete, those files you'd put onto DV using it. BT told me that I'd have to either upgrade back to Option 3 or pay the £5 a month to get at my own files!!
In the end, I had to go via BT's chairman to get Autobackup revived for a week or so so that I could delete my files.
Sorry to hijack the thread like this, but I thought you might like to know in case you're planning something similar. Make sure all your Autobackup files are removed from DV before deactivating it.