The ability to restrict a search to titles added in a specific period is unreliable.
Some titles appear when an otherwise identical search is conducted in two or more distinct periods. (It may be that some titles are omitted but this cannot be tested by the user). The problem was first reported to you many months ago but remains as at 25 Sept.2017. Users should not be reliant on this search facility until you can advise the problem has been corrected.
susan ford commented
I find the same problem as James.
I also find the addition of the label to save a search not only distracts but prevents clicking on the first entry