First review the BatchPatch.log (the current run is printed in the Remote Agent Log column) for the host that is reporting no applicable updates in the filtered collection. You can view this under Actions > Windows updates > View BatchPatch.log
In the BatchPatch.log you’ll see the reason why an update was filtered out. In between the following two sections of log each update that is filtered out will be printed with a reason such Reason:UpdateClassificationFiltering or similar.
::Begin filtering collection
::End filtering collection
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Update classification filters are configured globally under Tools > Settings > Windows Update
Update date filtering is configured globally under Tools > Settings > Windows Update
Individual update filtering is configured per-row under Actions > Windows updates > Filter… and are stored in the column Download/Install Filter