Can you post links to the pages you're describing? Are there really two IMDb Name Pages showing your data? Or do you mean you now have an IMDb Name Page, plus a user account (which you log into with your email address and a password, to be able to use site features)?
If there are two pages in your name it's simple to fix. But if you mean a user account (says user in the URL when you've logged in) and an IMDb Name Page in your name, they should not be merged and your user name is not searchable and not well suited for displaying credits and other data as people have no way to easily see it. They'll only see if you post on a message board or something, see your name, then click to look into your user profile.
Are these the two pages (if so they can be easily merged):
Stephen Patrick Hanna (Actor, Berlin Junction (2013))
Stephen Patrick Hannah
Or do you mean, as I guessed above, a user account and a page of the IMDb for listing Names that have appeared in Movie/TV credits.
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