Hmmm... Are you talking about a border between two territories of the same bonus, or two that have different bonuses?
Borders between territories should overlap each other, but if it's a little off it's no big deal.
Borders between territories from different bonuses however should be adjacent, so that the colours of the two different bonuses are clearly visible.
More info [here](http://wiki.warlight.net/index.php/Map_guidelines#Border_overlap
Or do you mean that you know of these rules, and followed them in Inkscape, but on WarLight it looks different? Perhaps you set the stroke width wrongly (or didn't change it at all), Inkscape sets it at default at 1.5 pixel, but it should be 1 pixel.