I'm searching on two terms without quotes. One term is very common. The other term is relatively common. However, there is only one post where both terms appear in the title and the title weight is now set to 100. I have the default operator set to "AND" with "OR" fallback turned on.
This search returns only two results, neither of which is the post with both words in the title. If I search with the terms in quotes, the correct post (and only that post) is returned. What's going on?