Hello!
If you put the same name in "Proper first name" as in "Preferred name" it should not show a name in parentheses.
You may initiate a merge with the other profile that's a duplicate, scroll down on the profile page, in the bottom there's a "initiate a merge" link, add the ID of the other Haskell, final ID needs to be the ID with the lowest number. If the other profile is private and you're not on the trusted list of the other profile you will have to wait for the other profile manager to finalize the merge.
Hope this helps.
Antonia