It's a very common error... and usually hardly ever mentioned here; especially when both buyer and seller are doing 90mph..

I could understand a mistake like this however I do not think this is the case due to the invoice he claims came from me.

In the picture he emailed me he shows a bubble envelope with an invoice behind it. The invoice has incorrect shipping info for both me and the buyer , its not a paypal nor ebay invoice. There is also no shipping address on the bubble envelope. If you zoom in on the envelope there is a part that appears to have been ripped off ( possibly a shipping label? )