I think I can help clear some of this up. The bottle log on Lambic.Info is 100% accurate with what has been released for A&G, including the December date. That info all comes to us straight from 3F. Whether or not all of those have been made available to gen pop is another story. The magnums certainly haven't. They're resting vertically in 3F's barrel room because they are explosively carbonated. The bottles might actually kill
andrewdrinks if he looks at them funny, they're that carbonated.
What we're getting tripped up on here is the word "batch" vs. what they really are... individual blends. It is going to be a continuous thing going forward and for a good while there will be two lines of OG: those blended with just lambic brewed by 3F and those blended with lambic brewed by 3F as well as wort they've received from other breweries and matured into lambic there. There simply isn't enough stock of 3F-brewed lambic to only release 3F-brewed geuze blends.
Regarding the words blend and batch... 3F is working on some new labeling and wording that is going to distinguish the idea of 1 bottle date = 1 blend, and that each blend has the potential to be wildly different depending on a myriad of factors. Without revealing too much, I think you will see that the new label(s) affixed to the new screen printed bottles will better help you track in which sequence the blend was done and in which season. I believe that will be the case for all of their line going forward.