There's a bit of inconsistency (which is not completely intuitive) regarding the filters for that tool.
The location-based filters are only for where suggestions are given, not filters for the matrix itself. This makes sense when those filters are used on their own, where it would normally be people trying to find caches to fill their grid but wanting to find ones close to home (or close to their travel destination).
Some (all?) of the other filters apply both to the grid and the suggestions, such as the date filter.