The smearing which appears around the upper entry wound, is duplicated very faintly around the lower entry wound site, indicating that the upper wound rested in the same area as the lower wound, and with this in mind, the blood which appears to be running and leaking from the lower wound, is actually blood which originally ran from the upper wound at a time when the head was lolled forward and blood from the upper wound became transferred around the lower wound, so that when the head was re-positioned, exposing in full view the whole of Sheila's neck, it looked like both wounds were bleeding fresh blood, when in fact there was only one wound bleeding - the upper wound...
Close examination of the relevant photograph, reveals these features, including the presence of the vertical blood trail of dried blood from the lower entry wound, which is absent from the upper one...
The only conclusion which anyone can arrive at is that both wounds were not inflicted close together...
in my opinion...