Hi,
I don't think it's a bug of the 4.4.2. The only thing we changed was the way the order statuses selector works (hence the previous bug you reported).
That must mean someone with a company with a valid VAT number located in Europe purchased something at amount on your website. Or maybe two or several of them.
Note that since you've selected "all statuses", it means that even orders with the status "created" are taken into account, even if they were not paid. So it's possible that the real number you want to take into account for your accounting is several times lower.
Basically, you need to check your orders manually to see what are the orders with that tax rate.