On the GX64 you can cut directly from CorelDraw. Not cutting the last part is usually because the roller on the right hasn't been set to the end of the medium, the cut is longer than the medium or the origin hasn't been set properly.
On the GX64 I always set the medium in Corel at 450mm, that gives you a little room to manoeuver. So obviously none of your cut lines can go over this horizontal limit.