>I got a problem. Whenever I press tab in the last object of child form in a formset (in respect of whatever mode I am i.e., edit or Add mode) it goes back to the top most form. I tried every thing like MODAL etc. but to the control goes back to top most form.
>Any suggestion would be highly appreciated.

This is the expected behavious.

Formsets are not usually worth the problems. Think about using 1 form with several pages on it.