Not all my reviews seem to be included on my Account page

Hi Viners.

I've recently been upgraded to Gold status and since my new evaluation period started, I've ordered and reviewed 23 items. All the reviews have been approved - nothing is pending. Yet on my 'Account' tab, it says I've reviewed only 17 items and 73% of my vine items for this period. Any idea what's happened to my missing 6 reviews? Or should I just contact Customer Services?