John, you said "If a record doesn't have an event date, It doesn't get excluded."
There are plenty of items having dates that are not excluded by comparing with vital dates of specific tree person.
In a huge number of instances the record dates simply have not been indexed, however, so the search engine wonkily lists them as results. Say, all of the WWI and WWII draft registration items, all Pension Application File Indexes . . . and many others that could readily be excluded as a group from results for a person born at a certain time or died at a certain time.