It defaults to All profiles 'related' in some way. There are a few lines 'above' the Generation 0 line. You can select 'Blood' so it will only show Blood relatives.
If you select Suggestions from the drop down under My WikiTree, that will give you the Suggestions for your Watch List, which are profiles that you are PM for or are on Trusted List, which might be what you really want to look at. You can also get to that list from the list that you are referencing by selecting the line 'Show suggestions in profiles managed by WikiTree ID' above Generation 0 line.