Part of it is to accept it won't be a 65 knot hull and only the fish will see it.
The reason it happens is sometimes some of the stitching from bilge panel to bottom panel is a bit tight when the bilge panel is pulled out to meet the topside panels.
Sometimes it can be a cutting error with some irregularity in the edge curve, but that is not so likely because the Eureka has a lot of points to line up with the batten - so it is easy to spot wrong ones.
The thinner plywood is more prone to the problem than 6mm.
It won't be critical for performance.
Michael