hbsag positive and hbsab positive for a long period, more than 6 month, indicates cronic infection with a mutant, ths form is rare and found more in asia
in most cases, it indicates an acute infection. Get other tests done (
http://www.medhelp.org/health_pages/Hepatitis/HepB-Introduction--Welcome-Page/show/34?cid=153 ) and post results here.