I am unable to open the PDF with the source information, however based upon the research notes in the space profile record I think you are correct. The important piece of information is the 1910 census record listing the uncle living in the same household (I have found several missing family links by finding relatives in same household in census records). My advice from similar situations is that when you update Hilton-833 you include your research as part of the biography section (may consider a specific Research section), and make sure each of your sources are documented and linked since that substantiates your research.