I came across some rendering problem while using <rich:collapsiblePanel>. When I am using multiple collapsiblePanel components, the first one is not renderred properly. Also It's contents are coming repeated outside the panel.
Plz find attached screens:
screen1: piece of code giving problem
screen2:lable/heading of first collapsiblePanel coming outside the panel
screen3:panel contents repeated once outside the panel, when clicked panel opens and same contents inside too.