I think this is "normal" and "natural". In fused collars, we add an extra layer to the fronts of the collar band so that they stay flat. The unfused collars have just the soft interlining inside, thus rolling. Some people like to attach 2 buttons to solve the "problem" and some attach the button higher. I think that either is not required. Typically, with the collar button buttoned, we would be wearing a tie and the bend would not be seen. Would love to be educated though. The collar looks really nice.