[development] form_api: same form called multiple times, wrong form_state values

Hi all, I have a small admin form (2 buttons and a hidden value) that is repeated multiple times (each time the value is different). Now whenever I access $form_state['values'] from the submit function, the hidden value always returns the data from the first form. When I print out $_POST directly I do get the correct data. I've been searching this and it seems this is because the form_state is cached. I couldn't find any workaround though, so for the moment working with $_POST. Anyone know the correct way to do this ? Tnx, HnLn