I am guessing that the FK Epp did take over experianced Armoured car men?
Lets also not forget, there are plenty of men in such units who were not part of the Tank Crews themselves. The Abteilung would have had supply, medical and signals men who were part of the unit, but not in a tank...
In the same way there are plenty of men in a modern Tank unit who are not part of the crews.
Also, at this later date there are lots of awards for accumulated brave service during 4 years of war, these are not related to a certain action in 1918.
An interesting award, maybe someday the answer will turn up :-)