I have never had a problem with them since I found a "system" to putting leaders in. I take the cover off, place my leaders in left to right, only placing the leader through the groove. I continue until its full of leaders, (still haven't wound them up yet). then I make sure all the leaders are sitting in the groove. I place the lid on, and wind them up all at once. This seems to do the trick. I have even puled them out of order and havent had a tangle up yet. Hope this makes sense.