>>He obviously qualified for all 3.<<
I don't see how you can state that. From the link you posted.
>>>>
3) When contemplating an award of this decoration, the key issue that commanders must take into consideration is the degree to which the enemy caused the injury.
(5) Examples of injuries or wounds which clearly do not qualify for award of the Purple Heart are as follows:
g) Accidents, to include explosive, aircraft, vehicular, and other accidental wounding not related to or caused by enemy action.
(h) Self-inflicted wounds, except when in the heat of battle, and not involving gross negligence.
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Looking at the criteria I would say that all three are somewhat questionable.