So I'm trying to make a map and doing fine, but all the bonuses overlap. I don't know how to fix this and the duplicate, difference trick isn't working. Any help?

What do you mean all the bonuses overlap?

Yes I create two different bonuses and the line between them is one color. I'm not sure how to fix it.

If you mean that 2 territories of different bonuses are next to each other and only 1 colour is visible? If so then to fix that you need to have it so that the borders are touching and not overlapping each other.

Ironic to see Skunk giving this advice when all his borders overlap and show only one color.

Incaman describes how to do this in his map making guide here: http://warlight.net/Forum/Thread?ThreadID=5837

What I did with http://warlight.net/Map?ID=10279 using inkscape is just duplicate one of the territories, made the stroke size 2px > convert stroke to path, and then subtracted that from the adjacent territories. It doesn't look as nice as Incaman's but I find that it's easier to do.

I do my by hand which means moving the nodes and putting them side by side so they don't overlap.

Wowbagger if I must tell I am testing this suggested method in a map I am creating at the moment. If it is successful in certain perimeters of which I am not telling you then I will keep making maps like that. If not back to my old way.