eBay has been having problems with inaccurate invoices going back at least a year.
Last spring I was charged $64 by eBay and I didn't sell one item! eBay ignored my inquiries, so I had to dispute it through my credit card. Since that incident, I have run into at least 6 other eBay users I personally know that have had "phantom" eBay charges appear on their credit cards. I wonder how many people pay without knowing... it could add up to millions of free dollars for eBay.
Always check your eBay invoices and watch your credit card... this company has a habit of overcharging or charging when NO charge should exist!