Hello, I use this numbering for my filing system. Have run across the situation of having 1st cousins marrying. He is number 22 and she is number 23. His mother would be 45 and her father would be 46. This makes THEIR father both 90 and 92. So going further back, I'm wondering, do I drop one number "line" or use both, with empty lineage? Hope this makes sense. Thank you, Roberta "Roberta" <gmarob@gmail.com>