Overnight usage not showing up

[#1]

I downloaded a couple of software updates just after midnight last night but they don't seem to be showing in our overnight usage in VMU (and definitely haven't been included in yesterday's usage either). Is VMU a little tardy today?

[#2]

Looks up to date to me, I've checked your hourly usage (can PM this to you if you want) and that's showing up fine too.

[#3]

Weird. The downloads last night were supposed to be 120MB approx (Mac updates to iTunes and Quick Time) but all that's showing in overnight usage is 1.47MB. I did it via Software Update so the updates were downloaded and installed in one go, so it's possible it didn't need to download as much as the progress bar was telling me. All the same I would have expected it to be higher than 1.47MB.
Today's paid usage is the sort of amount I was expecting to see, so that's OK.

[#4]

Hiya,
There's a possibility that the amount that you downloaded last night was disregarded as the interim CBC update between peak and off peak.
We get these updates every 15 minutes, so we ignore the first one in off peak time, to make sure you don't get charged for some peak usage that might overlap into your free time.

[#5]

That could well explain it, James!
It was JUST after midnight I started the download (though had my computer alerted me to it being available earlier in the day I would have done it then, having recently upgraded to BBYW Option 2).
Thanks; mystery solved I think.