I know for my three layer crochet waistband tutu I tied a slip knot but now I do a double knot and I love it! It looks wonderful! I don't like the slip knot version any more. When I do mine I do the layer then skip a row or two then do the next color etc... I don't know what u mean by "sticks straight up" mine lays down you also have to move your knot down too or in other words rearrange it. Hope that helps!