Anyone who did a bit of reading before coming here (that excludes straffo right away) knows how strict the LW was about kill claims. Without eyewitnesses, they would not even start the confirmation procedure, not to mention accepting the kill, which in most cases required the wreck itself. And of course it wasnt just kill, or no kill, but there were half a dozen success categories, like well shot up, shot out of formation, confirmed destruction etc.
Anybody who read the JG 26 war diary can see for himself that are practically no confirmation of kills for the unit after the end of 1944 - kills were claimed, but not accepted , as there was no good enough proof, and the process was lenghty, taking sometimes a year.
Besides, kills of a pilot as stated in various literature are often different what the LW really accepted in RL. Knoke is often ragarded with some 50 kills in books - in newer editions he himself told that it is a misread by the atuhro, he had about 30 officially accepted kills.