The last three sections of The Market (continued) are copies of the same part.
The last three parts of Prices (continued) are also copies of the same part.
I made a wiki page for this kind of error:
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:
iTunesu.mises.org
I had no idea there was an audio directory like that. Now I can listen to the parts I missed. Thanks!