This will be a long post. Sorry in advance.
Updating multiple name pages will take some time because some pages will need a name merge while other name pages will need a name split.
Since you've mentioned that Nathan Owen is your primary IMDb name, I'll suggest what to do for each name page.
1. Nathan Owen (I) / "The Trouble With Rain" credits:I went ahead and submitted an update moving all of the "The Trouble With Rain" credits on a different name page: Nathan Owen (IV). (For IMDb representatives: Contribution #170418-073624-619000)
2. Submit a Name Merge for the following name pages:Nathan Owen (II)
Nathan Owen (III)
You'll need to type the name this way:
Owen, Nathan (I)
Uncheck the box to the left of the following statement:
Preserve previous name on existing credits. i.e. '(as Nathan Owen)'
Also, write a brief statement why those pages are being merged.
(Same name, different person. You can provide the URL of this discussion as proof.
3. Submit a Name Merge for the following name pages:Nathan Owen Rothenstein
Nathan Owen Rothstein
Nate Rothstein
Type the name like in step #2.
Make sure the box is checked to the left of the statement on preserving the previous name on existing credits and write a brief statement in the explanation box.
4. Submit a Name Split for the following name page:Nathan Rothstein
The titles on this name page are cleanly split into two sections.
Click the check box under the Art Department member Credits, click the check box to the left of the statement:
Update existing credits with 'as'
Change the Move to from "Don't Move [Rothstein, Nathan]" to Other and type the name to the blank box this way:
Owen, Nathan (I)
Leave the Sound Department member Credits section as is.
All of these updates may take at least 48-72 hours or more to correct. So please be patient.
I hope this helps. Please write back if you have any more questions.
Submission Guide: Names
Merging a NameSplitting a Name