Windows minimize wrong

Sorry, I'll try to clarify. I don't mean minimizing to
the taskbar. When I drag the mouse over the middle
button in the top right of the panel (where the minimize
and close buttons are), a little note that says Restore
Down comes up. I click that button, and intead of
shrinking the window so that I can move it, it collapses
the window so that only the title bar is visible. Also,
new windows open up as just the blue title bar. That
clearer?