The last three sections of The Market (continued) are copies of the same part.
http://mises.org/media.aspx?action=category&ID=139
I made a wiki page for this kind of error:
MisesWiki:Media issues
and brought it to the attention of the media director.
In the mean time, you can find the missing pieces in the Mises iTunes U headquarters or the audiobooks directory:
http://media.mises.org/mp3/audiobooks/Mises/HumanAction
The last three parts of Prices (continued) are also copies of the same part.
I had no idea there was an audio directory like that. Now I can listen to the parts I missed. Thanks!