It's interesting that many of the Brooks CRs seem to have a slightly longer front right panel, below the zipper, than the left panel (from the wearer's perspective), as in Terry's video above but on others too. I wonder if that's just from years of pulling down on that side while zipping with the right hand..?
No tbey are just misaligned from what I have seen. Seams vary in accuracy also. Frankly a US Wings A2 is better made than most Brooks. Part of the charm for me.