I'm quite impressed there are people who actually notice these things!A truly accurate cursed Black Pearl would require some changes in the hull, since the Pearl went through some changes in her design from the first movie to the second one (Either they wanted to make the Pearl more elegant or they did not do their job properly. Either way, it resulted into in a "continuity error") But that would require doing modeling in the hull and modelers here probably have already a lot of things to do to bother with this.
I'd consider myself quite a major PotC fan, especially for the first film; but really I'd never catch that...