Blender issues with textureing

Im not sure if this is the right place to ask this but here goes. Whenever I make a mesh in blender and go to texture it whenever I paint it it draws lines on the seams other than were im drawing, its very annoying! Is there somthing im not doing right or is it just blender?

thanks

Make sure that your UVs are unwrapped properly, so that every triangle in your model is using a unique part of the texture.