Hm.. part of the reason might be because you're wearing eyeliner on your waterline, and it smudges? I used to do that, and it smudged all the time, and i stopped, and its better. Part of the reason.. could also be that its not such a great eyeliner. I hear Urban Decay's 24/7 eyeliner, is really good, maybe you should give it a try. As for the monolid.. I wouldn't know.. because I'm asian, but I have double eyelids.. (with the creases in both eyes).. yeah, so sorry. :( Good luck!