What is your 'Question' about "Merging"/"Combining" individuals/persons in "Family Tree" of 'FamilySearch'?
"Merging"/"Combining" individuals/person in "Family Tree" of 'FamilySearch' can be quite complex - and, should NOT be undertaken 'lightly'.
Here are some "Knowledge Articles" in 'FamilySearch':
How do I decide if two records in Family Tree are about the same person?
How do I merge possible duplicates in Family Tree?
How do I merge duplicates in Family Tree by ID?
Do these help?
The following link will provide you with steps on how to merge two individuals in Family Tree/FamilySearch
1st problem so far -- There is no switch button on the merge function, so the wrong person is being kept... I have use both persons & the opposite ID number to try to fix this...
If you have the two (x2) individuals/person 'Open' in, the same (as different) 'Tabs'; or, separately, in different, 'Windows'; then, make sure that you are 'working' on the one that you want to "Survive".
If you are seeing the "Duplication" in the "Research Help", of the one that you want to "Survive"; then, make sure that you 'Open' that "Research Help" as a NEW 'Tab' or 'Window'.
Whereas, if you are in "Tools" and using the "Merge by ID", make sure that your are working to the one that you want to "Survive"; then, enter the PID of the one that you want to be "Deleted"/"Archived".
That said ...
There ARE some instances when you can ONLY "Merge"/"Combine" individuals/persons so that ONLY a 'Certain' individual/person CAN/WILL "Survive".
Those instances, are few and far between ...
But, if you get one ...
There are particular reasons why those two individuals/persons can ONLY be "Merged"/"Combined" in a certain way, suffice to say that the reasons are 'Technical' and to do with the "System".
In such as the latter cases, there is NO choice.
We can only do what the "System" allows ...
Been there, done that ... And, I DID NOT like it one little bit.
@Sandra Sims Newell
Just in case you did not notice ...
That "Knowledge Article", that you just referenced in 'Answer'/"Comment', is ALSO, one the "Knowledge Articles", that I referenced in the FIRST 'Answer'/'Comment' in this post.