I'm 'on' in that I'm looking at 'My Ebay' but if I click 'Sell', the 'register or sign-in' page appears (why?), and as always, self-populates, but when I click 'sign on', it just returns again to my auto filled-in 'register or sign-in page'! With all the same details it was happy enough to allow me to access My Ebay with!
Why?!
I've already used 'sell' once today for 5 items, so why can't I access it now??