It is possible that at least one of the pilots mentioned above and on the LEMB thread did indeed engage Allied aircraft during the final stages of the war. But as you quite rightly say, a pilot’s memory should not to be trusted as a conclusive source.
I am however intrigued by the flight log entry you mention and assume this is a Flugbuch entry. Of course, all this does is confirm what most of the published sources record that He162's did engage Allied aircraft. Whether any He162's successfully shot down any Allied types is another question altogether!
Time for a Classic book on the subject me thinks
