The answer to your question is “yes”. You’ll notice that Jane gently pushes her warp towards the board as she is winding, but there comes a point where you are just asking for trouble if you try to put too many ends into one warp. You probably can wind one warp for a scarf (depending on it’s width and fineness of the yarn but I always wind several warps when I’m winding tea towels or anything wider or with thicker yarn. Another point to remember is that all warping boards are not created equal. Some will have longer dowels and therefore can hold wider warps. My warping board had relatively short dowels, so I got used to winding several warps for a single project. Clear as mud?