Merging duplicate people linked to a read only person
One example is Tracy Young Croxall Cannon
23 July 1879 – 6 November 1961
Since he is marked "read only" none of his children can be merged and there are four different people with different familysearch numbers per child. These duplicate people can't be merged. This creates duplicate people and needs to be corrected.
When you have a correction needed, it has better chance of getting seen and answered when it gets placed in the correct category. For example, I moved your question to the "Family Tree" category. The categories can be found in FamilySearch Help in the navigation bar or in the Categories sidebar. The side bar appears on the bottom right of any page in Community.
Please, don't hesitate to ask for more help if needed.