Scen Editor vs OOB?

[76mm]

I'm playing around with the German OOB, but have a question: in the scenario editor (set for 6/41), when I click on "Panzer Gruppe", there are several choices for type of tank (various Pz IIIs, PzKw 35(t), PzKw 38(t), etc.). But in the stock German OOB, there seem to be only two "Panzer Gruppes"--one with PzKw IIIEs, and one with King Tigers...where are the rest of the tank types?

I read the editor manual, and thought that different kinds of tanks could be dealt with via different availability dates, but there are no other tanks in these gruppes. Morever, all of the tanks in the scenario editor are available as of 6/41, so I don't think that "availablity" would help anyway.

So what am I doing wrong, where are these other tank platoons?