(This instruction seems to be missing a step noted below in blue italics ) .
Adding family members is done step-by-step. That is, you add a parent, sibling, spouse, or child from your profile. Then you can add a parent, sibling, spouse, or child from their profile. And so on.
For example, to add your paternal grandfather, start by adding your father.
First click the "Profile" or "Tree" link at the top of any page to go your profile or family tree.
CLICK the “EDIT” box that you see in the line across the top of the page. This will open your profile page for editing.
Now on the right hand side you should see the list of options to click including:
Add Father: Add Mother: Siblings: Spouses: Children
Click on whichever relation you wish to add and continue with the form for that new profile.
Then click the "[father?]" link from your profile or tree page. This brings you to a form for creating your father.
After creating your father's profile, create your grandfather's profile by clicking the "[father?]" link on your father's profile.
To add a family member to someone other than yourself, click to your Watchlist. This brings you to a list of all the profiles you have already created. You can add to their tree, by clicking the EDIT box on their profile page.
For trickier relationships, see the help pages on adoptions and step-parents and multiple marriages. For living people you want to invite to use WikiTree, see invitations.
Also, on the top right of your profile page you will see
My WikiTree Add Find Help
If you wish to Add a Profile of an unrelated person:
Click on Add, which will bring a drop down box and select New Person.