On your profile page go to the top right torch ADD. Don't click,,options will come down that says matches & mergers and click there. Another window opens, put in your surname with the highest # on top ...Like Jones-555. Put in the lower identical last name with the lower # Like Jones-55. & a comparison page will come down. Scroll down & compare. If you' convinced they are the same person click merge.
If your profile manager on the same people the merge will be complete & you shouldn't see the high # profile again. If you are not the manager of both profiles you won't have a merger an E-Mail will be sent to the other profile mansger will do the same if they agree. I believe the other manager has 60 days to approve. TOOOO LONG.
I'm sitting in the same position now. I believe the 2 unmerged profiles are causing a serious problem. Like your father becomes your nephew. Wierd things. I hope this helps.