Yes - no overlap is allowed. A gap of a few to about .020" is OK, but overlap will hurt accuracy. It pushes the bullet off centre.
Too, the twist of the paper(angle) should be faster than the angle of the rifling, or slower. Paul Mathews felt the angle should be opposite of the rifling, whereas original Sharps ammo meant for very shallow rifling of .002" or so, had the patch angled in the same direction as the rifling to it would theoretically unwrap when it left the muzzle.
Paul wanted the patch cut into strips.