What I wanted to say was that Pierre Le Gloan scored 5 full kills for one side and then 5 full kills for the other side.
None of the guys you mentioned scored 5 Vichy kills when shared kills are counted as decimals.
However Le Gloan is not unique anyway because Constantin Rosariu and Constantin Cantacuzino scored five times before and after changing sides.
http://www.igleize.fr/aces/ww2roma.htm
Le Gloan died when he tried an emergency landing without dropping his belly tank.
Is it possible to assume if the failed release of it was due to a technical error or if he simply forgot it ?