Section markers and footnotes - section marker starts footnotes on wrong page

I've placed section markers at the beginning of each chapter of a book I'm working on in Indesign CS5 so the footnotes will starts again at 1 at the beginning of each chapter. Most chapters are fine, but with 2 of them, even though I've placed the section markers in the right place, the footnotes start at 1 on the last page of the previous chapter. I've tried everything I can think of, but no matter where I place the section markers, the footnotes still start on the last page of the previous chapter. It's driving me nuts - can anyone help? Please??????