<p><a href="https://forum.team-mediaportal.com/threads/mp-1-25-pre-release-thread.139683/page-8#post-1269923">https://forum.team-mediaportal.com/threads/mp-1-25-pre-release-thread.139683/page-8#post-1269923&lt;/a&gt;&nbsp;&lt;/p>

<p>Interestingly, sort by duration works correctly for recorded radio, but the sorting is different. Recorded radio forces the virtual folders to be at the start of the list, and then each part is sorted by duration separately (so the virtual folders are sorted together, and the single files are sorted together, and then the latter list is appended to the former list).<br>
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Recorded TV does&nbsp;<i>not</i>&nbsp;force the virtual folders to the start of the list.&nbsp;<b>In my view this is better behaviour</b>, since the most-recent recording (if sorting by date) is always at the top of the list, regardless of whether it is a single file or a virtual folder. This more-complicated sorting might be why recorded TV is sorted incorrectly for duration (although the other sort types work correctly).</p>