Texture "Leaking" Off Mesh

Hi. Its like BokchoiJo said. Do the following:
- open the image in the image editing program and delete a good portion of the margin from the diffuse ( and other textures later);

- open the blend;
- select the mesh, switch to edit mode ( TAB );
- in uv editor press A to select all uvs, then click on Open and choose your edited diffuse;
- zoom onto the collar. You will see that the neck is unwrapped on the white part of the sweater;
- enable propotional editing;
- Alt-click on the collar to select it, press G Y, scroll the mouse wheel up to make the radios smaller, move the cursor until the collar does not take on the texture;