Reports Become Dated
Keep in mind, each research report is from a moment in time. The researchers findings and conclusions are based on the best known information they could find at the time within the scope of their objectives. Later research reports may expand upon and find evidence that changes our knowledge of the facts, but previous reports are not updated. For this reason, your due diligence in reviewing all the reports for each research subject is important. For example...
Immigrants Robert Seeley (SGS #1) and Obadiah Seeley (SGS #4) Are Not Related
For many years, the Society, and others, thought immigrant Robert Seeley (who arrived in New England with the Winthrop Fleet in 1630) was related to immigrant Obadiah Seeley (who arrived abt. 1640). However, DNA analysis of descendants of both Robert Seeley’s son (Nathaniel Seeley) and Obadiah Seeley indicate Robert and Obadiah were not related - neither father/son nor brothers nor even close cousins. So be aware, earlier reports on these immigrants and other sources of information beyond the Society will still state they are related, but we know now that's not the case.