AC3 audio importing as mono

I have a .mpg file captured using one of those Hauppauge Cable TV capture cards.  I'm capture video from my television station so I own the rights there.
The files capture with 2 audio tracks both in AC-3.  The only difference is the number of channels in Mediainfo.  Now, when I attempt to play these files in VLC player, I have to switch to the 2nd track of audio.  When I import the file into premiere, I only get a single MONO channel with no options.
Why is this happening? 
Audio #1
ID                                       : 189 (0xBD)-129 (0x81)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Mode extension                           : CM (complete main)
Format settings, Endianness              : Big
Muxing mode                              : DVD-Video
Duration                                 : 32mn 58s
Bit rate mode                            : Constant
Bit rate                                 : 384 Kbps
Channel(s)                               : 6 channels
Channel positions                        : Front: L C R, Side: L R, LFE
Sampling rate                            : 48.0 KHz
Bit depth                                : 16 bits
Compression mode                         : Lossy
Delay relative to video                  : -577ms
Stream size                              : 90.6 MiB (3%)
Audio #2
ID                                       : 189 (0xBD)-130 (0x82)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Mode extension                           : CM (complete main)
Format settings, Endianness              : Big
Muxing mode                              : DVD-Video
Duration                                 : 32mn 58s
Bit rate mode                            : Constant
Bit rate                                 : 192 Kbps
Channel(s)                               : 1 channel
Channel positions                        : Front: C
Sampling rate                            : 48.0 KHz
Bit depth                                : 16 bits
Compression mode                         : Lossy
Delay relative to video                  : -525ms
Stream size                              : 45.3 MiB (1%)

Well, you've got me - I didn't know the iPod could be made to output in mono.
Are you sure the headphone plug is all the way into the socket. I've seen some outer protective cases which have a small hole for the headphone plug and this stops the plug going all the way in to the socket. This could cause a mono output.
Also, are you sure that the lead on your headphones is not damaged, for instance, if the wires inside the cable are touching each other (when the shouldn't be) this could cause a mono output.

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