(Oh man, I had written this late last night, but somehow didn’t post it. You’ve gotten good advice, but might as well post it anyway :-))
The GF is cutting it twice becasue it’s reading the two lines that make up the outline of your objects. You can see it in the picture below. (My Corel program is in “wire” view so you can see it better. It gives a view of the file similar to an x-ray with the colors etc. stripped away.)
Your objects are made up of “compound paths”. Here’s an example of what you’re seeing. I placed the two rectangles on top of each other and “combined” them together to make a compound object. (Other program calls “combine” something different.) The GUI reads the red outlined box as two boxes on top of each other and is cutting both box out . It’s not reading the outlined box as just one single-stroke line. (Clear as mud yet :-P) The links below should help fix it.
