Hi i have a problem and it is about the split poligon tool.
I'm working on a head and are going to insert some new lines and need to use the split poligon tool.
When i put in the line i can see it when i press enter then then line only appears to the point were the mouth go in you may see it on the pictuers. Pic 1 were i put the points and pic 2 were the points apear.

What can be the problem? The mouth is closed all the way around so i dont have any holes.

Sorry for my english