The claimed Voynich page

[Koen G]

It's really very similar but not identical: the upper part of the G and the A are intertwined in reverse, there are gaps separating the intertwining letters, and the G appears more squashed, but perhaps it's just a perspective flaw. It could be a variant.

You are right, there is certainly a difference in the way G and A are intertwined. For the other points you mention, I am not certain. This is because the product is a mockup image with bevel/emboss - it's hard to see where exactly the borders of the lines are because of the black shadows. 

Also, to show the design as it would appear on wax, it needs to be mirrored in the mockup. Maybe this horizontal flipping, at some point, resulted in the top mixup.

I emailed the company, though I'm not sure if they will have anything more to say. Will keep you posted.