attempt problem due to preponement

i m a pcc strem ca final student who is expecting to write ca final exams in may 11 but due to preponement  i m eligible for nov 10 attempt also 

my question is that

CASE 1 if students give exams in nov 10 for single grp (cleared) & other grp in may 11(cleared) then he will be a 1st attempt ca or a 2 nd attempt ca 

CASE 2 if student give both grp  in may 11 and clears it (he was also eligible for nov2010 exams ) then he would be a 1st attempt ca or 2nd attempt 

give answer in both cases ???

how does it affects my job prospects ....as many companys prefer 1st attempt CA ???