Hi guys,
I meant to reply to this thread a long time ago, but I must have missed it, as I have with many other threads. This is not intentional of course, and I have some information which might help to clear up some of the confusion. The information I have about the middle cross is that it was overpainted relatively recently by a member of a volunteer group. If the story I have heard is correct, it was one of the guys who helped to "restore"

the Albatros D.Va in the late 1960's ..... two priceless relics substantially ruined, but the main thing is that they still exist, and can be salvaged, as the Albatros has been. Understandably the Australian War Memorial was not happy about the cross (or the Albatros - there were a few questionable "restorations" and other issues in the earlier years), to say the least and I have no idea why someone, even a volunteer worker would do such a thing. I hope this helps to clear up some of the confusion.
Cheers,
David.