You mean, those are moments you choose to ignore because they don't fit your head canon.
1- First known attack with AdvCoC which allows Luffy to understand it. There is no more important moment than that related to the AdvCoC. There may be similar importance, but no more. And
you can see how he hits Luffy.
2- Luffy's defeat in the moment of greatest tension to date, which means chaos for the alliance. Very important moment too. Once again,
he is seen hitting Luffy.
3- Defeat Kinemon protecting the last bastion of the alliance. Kinemon, an important character who has been with us since Punk Hazar. Very important and emotional moment. And
again we see how the attack hits him.
4- First confrontation with an Admiral on equal terms. important moment for the series. Once again,
we see how the attack hits.
5- Luffy's first serious damage to an Admiral, important moment. Once
again, you can see how he hits.
I
n general, AdvCoC attacks that hit are more important to the plot because they are generating damage or causing defeats. While attacks that do not hit have no consequences. The only exceptions are Roger and Shiro's clash, because it is an important moment, and the first clash between Luffy and Kaido, and even then, they are less important overall than any of the examples I gave.
I insist that you cannot ignore the parts of the manga that do not fit your head canon. I do not do it.
Saying that they are not important moments or Oda's mistakes are not an explanation. Between that and the fact that it is your head canon, I'll take the second option.