The pics show that the template is not being used being used quite correctly, so this might be the problem -
Preliminary - hopefully you also confirmed a dimension against the drawing to make sure it printed to scale (mine printed about 7% small & had to be scaled up on a copier)
But to use it properly - from the pics it appears that there are no hubcentric adapter in the wheels (I would recommend fitting some, regardless of the brake issue - you can get these at Discount tire, or mail-order)
What that has done is offset the position of the template - if you look at the drawing or the pictures, you will see a white section in the shaded area: this represents where the stud would go; on your pics, this is pushed closer to the centre which would make the "fat" part of the caliper locate differently, perhaps in a more conducive spoke location which would make it "fit". In the case of the SSR's this would not actually cause any difference as from the pics it looks like it would create more room; however in the Antera's spoke design it looks narrower further out?
However, I don't understand that there is a still a question of the 8mm, even allowing for this - the Antera pics are shown with the spacer on the rim, so why would you expect it fit without?
edit: misunderstanding on my part re final paragraph as I refer to the other thread on this subject - the issue is that it also needs the spacer for the SSR's. The other comments are still valid however.