Application > Files List Badly Misbehaving

When I'm navigating the file list under Application > File (using DWMX 7.0.1),
and I click the "-" to collapse a folder, then if I scroll down to expand
another folder below, the first folder will frequently re-expand on its own,
and reposition the file list at the old location. There is a lot of
unnecessary scrolling up and down.

Is there a setting that I am missing, or does everyone suffer with this
anomoly?