Win 7, Excel 2007 - When Pin to List all sheets in new Taskbar ico

Hi

Up until recently I was using Windows 7 32-bit RTM with Excel 2007 SP2 with
nor problems including the Taskbar Excel icon showing me the open and recent
sheets from the main Excel icon in the Taskbar.

However, after starting to use the "Pin to this List" option to get regular
sheets from the main Excel icon, every time I open a pinned or recent
document from the main Excel icon all sheet now appear under a new/temporary
Excel icon. The only sheets that appear in the main Excel icon are New(blank)
ones.

Ok- so not the end of the world but it is a major annoyance and all other
apps are working with the Taskbar as expected.

Hope someone out there can guide me to fix this.

Thanks

tomhass