I think the search is broken...
I have a long drawn out Word Document to show the problem. Too far off to just be the person I'm searching for... I hate creating duplicates, so I try very hard to find the people before adding or even trying to add someone.
I don't think it can be better explained than looking at my actual searches.
I hope this works for you to see it, but if not, my search started out as:
Herman Stuart Foldren
Spouse: Sammie Anna Wilkes
Most of the results were Coldren/Caldren
remove spouse and add b. and d. dates