Hello Kanchan,
As per WebI report Section Behavior, When we set each Section to start in New Page it has different outcome at first page than any other pages. Only First Page Section start where you have place Section Text, But from Second page section by default start from immediately below Report Header.
I tried with eFashion Universe. I was also getting Same output as you earlier. But then I have changed the "Minimum Top Offset" Value in Layout, under Section Property to 0.00 ( surprisingly it allowed me). Dont manually enter value instead use Arrow to update value. This will allow you to set 0.00. See below image
Please try doing this and i guess this should work.
Regards,
Sushil Padhye