The Configuration Map is the mapping diagram that displays the internal and external backups and overcuts for the selected Current Bevel Type in the current Cartridge Type Tab. The arrows display the cutting direction, and are color coordinated to match up with the backup and overcut fields. The maps are displayed from the front side of the matboard.

Look at the front of the last mat you have cut, in the same orientation in which it was cut.

Use the Configuration Map to determine the problem area. 

In this example, compare the lines that are too long to the lines on the Configuration Map. 

These long lines are the Exterior Backups, which are displayed on the Configuration Map as Green Arrows.

Decrease the Exterior Backup in the Configurations by a couple of clicks, click OK, and do a test cut.

Adjust until you get the desired result.