RAGIII,
I can not see that Imrie is saying "aerial victory" in your quotation!
He is only writing "victories" and the term "victories" can include airplanes, balloons, airships, ships, tanks etc. etc.
Note, both men got offical confirmation for the destruction of a tank (see Nachrichtenblatt).
The victories against the tanks happened on 23 August 1918.
So it was Greim´s 23 victory (22 aerial victories and 1 tank destroyed).
And it was Pütz 8 victory (aerial victory number 7 on 22 August plus 1 tank destroyed on 23 August). However, if Pütz got the confirmation for the tank on 23 August earlier than for his aerial victory of 22 August then it could have been victory number 7 in the order of confirmation.
The lists mentioned by DSA in the Nachrichtenblatt are Abschusslisten only for aerial victories of airmen. However, the Nachrichtenblatt reported also the confirmation of the two destroyed tanks.
The pilots would get entries in their documents and it is possible that Greim had a tank destroyed listed on "position 23".
Remember the German Marineflieger (Navy aviators) - some had "mixed" victory lists of destroyed airpanes and ships.
Agreed?
PS: For your question 3 look at
http://www.theaerodrome.com/forum/20...er-g-nter.html
This action of the aircrew was also reported in the (daily) "Heeresbericht" because it was seen as an important example of determined tank hunting.