Powerpoint window off the screen

I opened powerpoint, and opened a recent presentation. The presentation did not appear. I went into mission control, and saw the window was there. When dragging the window into a new desktop, it simply rose to the top left (outside the desktop preview) and faded away. Look at the sequence of images, you'll see what i mean:

BTW: The first image should actually say 'Desktop 1'. I messed up in the screen shots!