While the help index does give an indication of the proper order of the sections I have not read anything that precludes including some short text or other note above the bio section bar. Indeed, many royals and politicians have succession boxes above the bio section bar and some profiles have portraits above the bio section as well.
In this case, I don't think that you need a == Section == to put this information at all. I would just put it as a 'note' above the bio bar:
'''Note:''' This profile represents Captain John Slatton of Hawkins County, Tennessee, formerly of Greenville District, South Carolina. This man's date and location of birth are unknown. There is no provable father for Captain John, only family stories that he might be the son of a John. Please do not alter the vitals for this profile without discussion with the profile managers. See the research notes for details.
== Biography ==
Text of biography...
Leif's suggestion or PPP is sound if you can find a project that he would fit under.