I just noticed that when searching with a filter, some results that should appear do not, even though they would appear if searching by reading, meaning, or radical alone. For example, a search for either きょう, gorge, or やまへん (the search term, not the radical filter) will return results containing both 峡 and 峽. However, if a search for きょう or gorge is combined with the radical filter for やまへん, the page for 峡 loads, even though 峽 has the same readings, meaning, and radical. Also, if a blank search is ran with the filter for やまへん turned on, there are multiple results, but 峽 does not appear in them.