Can't see list of minimized windows when I minimize windows into application
I love the Mac option to minimize windows into application icon, but recently it's behaving abnormally for me. When I minimize, for example, three Word documents into the application icon, I don't see the list of those documents when I click on the icon (they usually stack vertically in the menu, above "Options"). To see those documents, I have to click the application icon and select "show all windows".
I can't figure out what's going on, and it's driving me nuts.
What I'm seeing (I have three documents minimized into the Word application here):
What I should be seeing (This is just a screen grab from a tutorial, not my machine):
Here are my current dock preferences/settings:
I've already rebooted. Any ideas? Thanks in advance!!
MacBook Pro with Retina display, OS X Mountain Lion (10.8.4)