what bwb said.... happend to me when i started, drove me mental trying to figure out what id done wrong. now one i do the first loop and tied it on with one knot i take the loop, mesh whatever you want to call it, off the board and tie a knot over the first knot to keep it in place. takes me longer but i know its not going to work loose. then once you've made a few decent nets you can move onto shaped ones, much quicker to make and take less material.