To Merge or Alternative name change?

I think you need to merge the names.  You will need to pick one as your preferred name, perhaps the one you use most commonly or the one you plan to use for credits in the future.  On the credits where the other name is used, it will say "(as Alternate Name)" beside your credit, so it will always be clear which name was used for a particular credit.

On the page of the name you wish to keep, click "Edit" at the bottom of the page.  On the next screen choose the very first option "Name Correction or Merge."  Then type in the other name that you want merged with this one and leave the box checked which says "Preserve previous name on existing credits."  In the explanation make it clear which name you wish to be used.  Then your credits will all be on one page with an indication as to which credits used your alternate name.