Hello Victoria,
“Help:GEDCOM-Created Biographies” tells how to clean up GEDCOM manually, and has details that can apply to the profile you are working.
“Steps toward improved profiles” has a nice checklist you can use, and is followed by examples of nice profiles.
For sources appearing twice (once as a numbered entry and once as a “dotted” entry), put their information together into the numbered entry, and then drop the dotted entry. Sources applied to specific statements in text (ie, the numbered sources) supersede their generally listed versions applied to the overall text body (ie, the dotted sources).
When you are done with the Text section (the biography and sources and any research notes) of the profile, be sure to go into Edit and update the Data and Family sections, which have input fields for names and dates and places, along with radio buttons for certainty. Updating these fields helps WikiTree do its automated magic.
As a comment, there are two general ways to write the text of a WikiTree profile biography. One way is to structure the biography in outline form, with separate sections for birth-marriage-death statistics, for residences, for family members, and so on. The other way is to write the biography as a storytelling narrative, usually but not always in chronological order. Both ways appear in WikiTree, and both work fine.