An important think about the port-a-wrap is that the rope has to continue in the same spiraling direction. Some people want to bend it back around the 1/2" rod that guides the rope to the barrel/ serves as the anchor point.
This seems to happen the most when there is 1/2 a wrap, resulting in a sharp bend in the rope. Use the post that extends through the barrel as a guide/ fairlead.
As Norm pointed out, changing the direction from one lower to the next will keep it from hockling/ kinking up the rope as much. (Never thought of that Norm. Of course it makes sense once hearing it. I almost never am the POW operator, and hadn't pondered optimal POW usage. Thanks.)
Sometimes for small branches, it is easier to natural-crotch rig/lower the limbs from a stub that will be removed, so as not to burn any "keeper" cambium.
Also, using a leather Cambium Saver tube will protect "keeper" cambium from your rigging rope, as well as protect your rope. (Be sure to use a rope that is meant for natural crotching.)