Pieter
The topic of Steinhoff in JG2 came up not long ago - see the attached thread.
http://forum.12oclockhigh.net/showthread.php?t=21823
In light of this earlier thread with the information supplied in this thread, makes me believe that Steinhoff was in 10(N)/JG2.
From my notes I have IV/JG2 being formed from 10(N)/JG2, 10(N)/JG26 and 10(N)/JG72 on 3rd February 1940 before becoming II./NJG1 on 25th June 1940. I have no proof of this, but I believe that when IV/JG2 was formed from 10(N)/JG2 everyone automatically assumed that this Staffel remained as 10(N)./JG2
However what if the numbering went by seniority of the sub-units i.e.
10(N)/JG26 formed prior June 1939
10(N)/JG2 formed 1st June 1939
10(N)/JG72 formed 15th July 1939
Therefore these would become 10, 11 and 12 staffel in that order.
Then 10(N)./JG26 would have became 10(N)./JG2 which would then have Steinhoff being the Staffelkapitan of 10(N)./JG2 not 11(N)./JG2. Thus the Steinhoff's signature in the other mentioned thread would've been Staffelkapitan of 10(N)./JG2 and his claims for Blenhiem in holland fits in where where this staffel was located, not in Norway with 11(N)./JG26.
This is not the confirmation you were looking for but opens the door for another possibilities.
Regards,
Craig...