Please be MORE Specific, as there are 4 Register Reports, right?
Which one are you using?
Who is the Starting Person?
On your Simple Ahnentafel Report, starting with Janet, WHERE would the Macdonald be in that tree.
I don't know your tree, and there are too many messages in this thread to try to figure it out for you here.
Looking at Janet's Ahnentafel Report, you should see ALL of her Ancestors. In what Generation should the Macdonalds who up? In the RH Panel, how many Generations have you selected to show? I think the Default number is 4. So, if they are 5 generations back, then they won't show up. But, you can change the number of Generation to where the WILL be included.
If you go back to the oldest Macdonald and look at the Descendant report, do the Scotts show up?