Thanks for the reply. I did check the full list to make sure there were no duplicates and although there is 2 "Amelia Gubbins" they are different individuals.They were born nearly 30 years apart. And there are 2 "John Cowlings" but one is the father to the other.
I set the tree to public so hopefully you can find it now. The persons above are the ones in question. If you view the family tree of any of the children the problem will be exhibited.
PS. My next step is to print out the view and try to follow the lines to see what maybe the cause. After that I will just delete both persons from my tree and recreate them from scratch.