Yep. All in all Toei screwed up badly with this one. Shiki didn't even comment on the Strawhats. Just on the beetle. =/
Except if it was as you said a mistranslation and this filler was nothing more than an excuse to show a bit of Shiki's plan of taking all over the world with mutated animals and bugs…
Well let's hope it was a mistranslation because if not then the beginning of the movie will surely make for a big wtf moment. :ninja: