JSAX

When cutting more than approx 2 feet, the cutter doesn't cut properly. For example, when doing a series of rectangles 4 feet x 3 inches that are side by side, a couple of them will be fine, but for a couple the cuts will be overlapping. I just cut some words surrounded by a rectangle...in the bottom corner, the cuts for the rectangle don't quite line up. What do I need to adjust to make it cut properly? Thanks!