There's a thing called slippage. Also if they are brand new did you remember to stretch em out a little? When you wind your strings you gotta make sure it's wound perfectly without the string over lapping itself. Wind top to bottom and be sure not to leave too much slack or there is no way you can wind them without them overlapping. Make sure to have enough or you won't get a good anchor and you'll break a string within a week. From your pic it looks like they are a little messy but eventually you'll be able to string em up no prob, especially once you find the strings that you will always use.