In "Preview" 2 issues: clear last images opened & zoom not working

Any images opened in "Preview" from the past, all open up when I select other or new images to view. Basically anything I've opened in Preview since the install of Lion all opens when I select new images or items to view in Preview. Just now, 15 separate windows opened after I selected 3 images from the same folder. The other windows all contain items and images I've opened in the past few weeks. This is crazy annoying. I've never seen this before. I looked in preferences and I can't find anything to clear last opened or something to that effect. Please advise.

Secondly, in Lion, on both my Macbook Pro & iMac, I can no longer use my smart mouse, trackpad...to expand the items/images in my folders prior to opening them. Usually I could open a folder, see there are numerous images and use my fingers to zoom in & out on all the items of that folder w/my trackpad. Since Lion, no more.