I don't know if it's me, but when I walked my feet would come right up out of the shoes at the back.  I loved the shoes and I was searching for the perfect pair of black church shoes with the correct height for the longest time, so I didn't want to give them up.  However, with this problem, I wasn't confident walking in these shoes.  I took them to my local cobbler (fixer-upper lol) and he put one strap around each ankle.  Now they are perfect for me. :)