I am a DJ, and I create a weekly mixshow/podcast for an online radio station who is using Centova, and they have been recently having problems with my mp3 files.  I encode them at 128kbps stereo using my Mixmeister software.  Other DJ's on her station use the same software and they don't seem to have a problem, although they may be using a PC and I'm using the Mac version of Mixmeister.

I have also tried encoding it to a WAV in Mixmeister, and then using iTunes to convert it to a 128kbps mp3 file.  It seems to be hit or miss, but what happens when she uploads it to their Centova server is it shows up in the console as a 56kbps file at twice the length of the original file, 2 hours instead of 1 hour.

Per the Centova Knowledge Base, I used a program called MP3Test to check the validity of the file, and it says the file has no errors.

So, I'm at a loss as to why this keeps happening.  Does anyone have any recommendations how I can make sure my file works perfectly every time it is uploaded to the server?

If you want to check my source file it is located here:
http://www.djrobsd.com/podcast/djrobklaproth040413.mp3

The first step would be to define "having problems".  What problems, exactly, are they having with your MP3 files?