new project mysteriously created?

i was working on a project when i noticed that there was a double icon of it on my desktop.

i clicked on it only to find one of my drawings inside.

then when I went back to the original project the and the drawing wasn’t there. an error message appeared and said the picture was missing, may have been misplaced, deleted, etc…

i was just curious about this. it didn’t seem to be a problem as I could just cut and past the drawing from the new icon, I just thought i would ask about it.

i am working on a mac. system 10.3. version 2.5