Hi Madelaine,
O.K so it's like this,
UK 541,749
US 574,044
Making a total of 1,115,793
Then I went to the Italian site and they have 400,528, which would make 1,515,321, I have been to the Italian site and I am pretty sure they have nowhere near that number, and as you said earlier that is the number AVAILABLE to that country, so we can't work out the total each country has listed with just their items up for auction.
It is too confusing, so I will just carry on posting the number of auctions as in the UK site.
And that is amazing you sold 5 items yesterday, I must be selling the wrong items, I have only sold 2 items out of 220 listings in the last month and a half