thanks for your feed back, i have found out why this happenend. initially i should have posted the following image:
this is the original svg file from the internet, as u can see, the "unexplainable line" is from the original image but it was hidden in inkscape, i oversaw it. also, i didnt stress enough that i am using it as an artwork and not as playable territories.
Edited 5/30/2015 18:06:56