First Sosa N° This is a numbering mostly used apparently in Europe (France?)for ascendant identification. It based on the following. The first individual ( my son) is 1 his father is 2 his mother is 3 and so on. Therefore if I look at my ancestor N°200, his spouse will be 201, his father will be 400, his mother 401; They will be (200/201)father and mother of my ancestor 100.
Now common parents recogntion. I use Sosa n° in the ID registration but in my mind, I could use any N° or letter as it is an open space. However, I suspect this to be the reason for non recognition.
In Europe around the 17/18th century, it was very normal to mary a neibourgh because there was no other transportation than foot or horse. Consequently, the common parents are fairly common. For instance, I have a couple which appears 3 times in the middle of the 17th century. At this stage FAP doesnt't make the link.
You mentione the database, do you mean the "individual list" ? If so, they are on 3 differents entry for the above.
I am not sure to be 100% clear ??
I could remove all the "ID" but as I started using the Sosa numbering, I still hesitate.
Thanks for considering my problem. Best regards Michel