Uncredited Actor currently listed on film's Main Cast; yet submission for 3 other Uncredited Actors being denied despite US Copyright proof

Hi @Michelle and crew. On this film's IMDB page right now, there is currently an actor (Innocent) in the cast list with (uncredited) after his name. In the film, he is credited in Additional Voices, but it's been confirmed in reporting and on Pixar's US Copyright Registration that he indeed voices the character Polo in the film. Pixar didn't credit small character roles in the movie, they lumped the actors into Additional Voices.

Here's my submission ID: #230704-164110-797000

However, when I tried to add 3 other actors to the main cast with their uncredited character names, I'm being denied despite these being provable by referencing Pixar's US Copyright registration for the movie (which I uploaded as proof). Same as the existing credit on IMDB right now for Innocent. These are notable characters with lines (such as Pixar's first nonbinary character, which was all over the news few weeks ago).

Any insight you can provide as to why Innocent's uncredited role is acceptable on this page (it's live on the page right now), but these other 3 actors are not acceptable, would be helpful. The US Government Document should be irrefutable proof (I uploaded this to IMDB as part of my claim):

 https://publicrecords.copyright.gov/detailed-record/34560005?query=Pixar&field_type=Keyword&records_per_page=10&page_number=0&date_field=representative_date&sort_field=representative_date&sort_order=desc

On a separate note, I resubmitted several times with escalating and different proof, and now I think I've been put on a blacklist for my determination. I'm not sure how a publicly accessible US copyright document is not considered proof. It's frustrating that there's already an uncredited actor on the IMDB cast list, yet I can't get fair recognition for these other 3 actors that played small characters in the film. 

Again, thank you for your time and help. I'm sure it is not easy to deal with complaints and issues all day. You're all saints!