While going back through my tree the other day I was suddenly faced with lines everywhere, black and light blue. I then realised it was because of two cousins that married. William and Sally Clatworthy were brother and sister. Sally married and became Sally Hawkins and her daughter Mary Hawkins married James Clatworthy, Williams son. Simple right, but my tree seems to find it hard to digest. I tried merging duplicates in family view but ended up accidently deleting James's ancestry (luckily it was all still attached to Mary). I thought I fixed it but when I went on just now I have two sets of Mary Hawkins and James Clatworthy, side by side and it seems duplicate children too. Is it just going to look like that because both have the same family history or is there an easier way to sort it. I read someone mention A-Z list of tree member, I'm about to have a look if I have duplicates there.