First of all, I advise to switch to the Advanced tab. In there you can exactly see what you are doing, unlike the Simple tab.

You can fix the mat zone problem using the Grouping Tool. Make groups for the mat zones and assign the correct materials to the groups, then delete the groups again.

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

My gallery   My freestuff