It is possible that this airplane was repaired and put into service (at a time when vast number of perfectly good airplanes were going to the scrapyard) and ended up crashing a second time flown by a pilot in 97th FS (a F-51H equipped unit that does not record the crash details in its annual historical summary). See:
http://users.vermontel.net//~tomh/AI.../MHT/82FG.html
While the mid air collision did not reportedly result in damage to another USAAF aircraft that would put it on the list, it could be that the P-51D in question ended up with some other outfit (ANG training?) as the historical summary identifies issues with F-51Hs.