OK, so I got it to happen finally, right after I quicksaved. If it doesnt work the first time around, re-load and do it again until it happens.
here is an image of the line going from a smooth curve into a jagged edge. It happens around 75% into the auto burn, but I turned it off and slowly burned at around 65% so I could get this pic.
One more thing to add to my previous post. The segmented line flight path bug cleared up on its own once my craft entered the effective planets atmosphere. In this case with the Uranus analog, about 140-145km, when drag started to slow my ship. As soon as my velocity changed due to drag, the flight path on the map screen updated to a smooth curve and tracked the correct changes from my aero capture.