Sinisa/Larry
There is one other, more modern (secondary) source, Die Deutsche Luftwaffe, Zerstörer und Nachtjagdverbände Teil 2 by Meyer/Stipdonk.
They state
11.(NJ)/LG 2: Formed at the end of May or early June 1939.
Redesignated 10.(NJ)/JG 26 in September 1939.
Staffelkapitän: Johannes Steinhoff May/June 1939 - 1 Sept 1939
Again redesignated as 11.(N)/JG 2 on 3 Feb 1940
Staffelkapitän: Johannes Steinhoff 3 Feb 1940 - 25.6.1940
Finally redesignated 5./NJG 1
So as far as they are concerned 11.(NJ)/LG 2, 10.(N)/JG 26 and 11.(N)/JG 2 are one and the same unit at various times during appx one year. Steinhoff was obviously in command the whole time!
Not bad, even by Luftwaffe standard...
It means that basically both ref 1 and 2 are correct, but none tells the complete story. What do you think?
Cheers
Stig
PS: I also believe we can drop all LG 1 connections with any night fighter unit. Meyer/Stipdonk does not mention it and neither does Peter Taghon
Furthermore Johannes Steinhoff has nothing to do with that unit either