I got it....
Initially i put the groups in Footer section which gave weird results....and then i changed the groups to the header section...it worked fine. why the same data behaves so differently when placed in different sections?
I understand, if i put the information in detail sec. instead of Header/footer, it might give unexpected results...but in a small report like that of mine, where not much of a fields are there in every section, between footer and header i dont see much of a difference...)
Thanks in Advance.
A