A couple of points worth considering...Remember, there were different types of claims made:
-Spur of the moment, post-combat unofficial claims made by crews...
usually in error because several people shot at the same target..an honest mistake.
-Claims that a target, air, ground or ship, was destroyed when it wasn't.
It was damaged but repaired. this often happened with warships...on both sides. Again, an honest error.
Now remember, jubilant crews met with war correspondents who disseminated those claims. Those comments, while passed by military censors, were not "official" statements or claims.
Don't believe for a moment that Hap Arnold, Chester Nimitz or their Intel staffs put much stock into those claims.
I think the U.S. military did a fairly honest job, albeit post war, in sorting out the official tally once they had access to enemy records.
Look at the Strategic Bombing Survey...a hard look at the effects of American efforts (and often used by British partisan authors to show how bad the 8th AF presumably was

).
We have all read where an ace's (or groups) total was subsequently revised.
I recall an official effort in the '80s to revise the F-86 vs MiG records.
as new information became available. IIRC, the USAF out out a news release.
So, condider the various sources.
The official numbers have been revised, so don't confuse thoughtful and researched tallys with wartime propaganda, self serving memoirs, or
Cadin-esque "Rah-rah" potboilers.