Registration Process Repeats

-- url of the page with the problem -- : www.vivatec.hk
-- HikaShop version -- : latest
-- Joomla version -- : 2.5
-- Browser(s) name and version -- : latest Chrome & Firefox

May I know why the registration process is so complicated ( ask again the username, password ) on the second page of registration during checkout?

See attachment please

Hi,
I think that you'll probably find your answer through this thread .