Sunnyhope, I can only think that maybe the template has moved as you have moved your hands to draw around the inside square. Do they sell 'Bluetack or white tack' in Sweden? It is the sticky stuff that is reusable what you stick posters to the wall with. If you have some of that just place a tiny piece on the four corners and then press the template down on the fabric firmly. This will hold the template while you draw :D
If you have a cutting mat that has measurements on, then I suggest you practice using that to cut your fabric too :D