A couple of possibilities...
When you designed your project, was the carving placed on the edge of the board? When we position and scale in the machine, we are placing the board you designed in the Designer not just the carvings on the board.
Did opt to "Keep Under Rollers"? This will add 3.5" to either end of your board to ensure the board stays under the rollers while carving.
I apologize if you are aware of these possibilities, but there has been a little confusion on these points and so maybe this will help clarify for other users.
Chris Morlier
CarveWright