Usually, yes...if I know what they are, they can be fixed.
The rules for seiyuus work differently. They can be credited for dozens of different anime tracks from multiple series. But every series can also have a host of seiyuus. So how do you decide what goes where?
With Western animation, it's easy. Everything can be credited to South Park or The Simpsons since its voice actors are (usually) known for only that. And if not, they can be linked.
In Japan, seiyuus are celebrities for their voice work alone. Considering what they have to endure to become seiyuus to begin with, this is entirely justified. So they can have artist pages that have the series they voiced.
The priority is for visitors to the site to be able to find what they want with a minimum of fuss. Wayne worked this out years ago. The pages auto-link when you put all the names in all the members boxes of all the pages involved. Unless they're not spelled correctly. Then- insta-fail.
Look at this page. Are there any names in the members box? No?...Well there's your problem. If the names were there and on the artist's page, everything would link to everything else and it wouldn't matter who got credit for what because you'd be able to find everything easily. And that's the important part.
Who voices Ash or Misty or Brock? Find out & put it in the members box. We may have a page for the seiyuu already. And I know the member box edit screen's confusing. I should post instructions for what boxes to fill there somewhere....