Does not meet contribution guidelines (Cast Additions)

I've been trying to update my IMDB page to include 19 older movies that I worked on (uncredited) as a voice actor. Most of them I was employed to "voicematch" or "sound-alike" one of the main cast members who was not available for ADR/looping in post. Because of this, I usually get no credit (and in some cases am required to sign an NDA agreeing not to reveal which actor I replaced), but in the past have always had no problem with getting an IMDB listing by submitting myself using the character name "Additional Voices" and the "uncredited" attribute.

Of the 19 I just submitted, 1 was accepted (it had an actual character name) and 18 were declined due to "Does not meet contribution guidelines." Three of those declined I resubmitted with copies of my SAG day player contract or copies of my residuals from studio payroll--but they were also declined because of the same issue.

Can anyone tell me what the specific issue/problem is? To be clear, these are NOT dubbing jobs or being part of a "loop group". I'm always on the ADR stage or in a recording booth, with a director, filling in for another member of the main cast & recording lines in their original language that end up in the film.

The recent submissions are listed below:

241213-212900-426000 (resubmission with proof of employment)

241213-212233-281000  (resubmission with proof of employment)

241213-205552-360000 (resubmission with proof of employment)

241213-192059-062000 

241213-191956-734000 

241213-191537-158000 

241213-191123-080000 

241213-190929-521000 

241213-190630-530000 

241213-183711-737000 

241213-183126-152000 

241213-175727-842000 

241213-175620-756000 

241213-175246-352000 

241213-174914-363000 

241213-174727-588000 

241213-174401-781000 

241213-173703-129000 - approved

241213-173113-430000