I have never merged before. I would need help from FamilySearch volunteers, if possible, on this problem of merging duplicates. This is for the same person listed under Rose Aimee Theberge Kn4D-SD7 which system listing her husband and later patner. Then same person listed under name Rose Ann Aimee Theberge K8H3-N6M which has date of birth and death memorial card. Rose Aimee is the name she used in her adult life.
This article gives you step on how to do a merge. Please let me know if you need more help than what is found there. How do I merge possible duplicates in Family Tree?