Closed Captioned .MXF w/ dual mono audio ?

This may be addressed in the XDCAM forum, but I'm curious if someone may have come across a similar situation when delivering CC'd HD files.

I'm delivering a CC'd .MXF for broadcast, using FCP7 with the XDCAM plugin to create the .MXF file. All of my test files have been approved and everything works fine. However, when ouputting the file it requires that I turn the stereo files into dual mono files. When I listen back to the file with something like Quicktime it sounds like both tracks are center panned, but when I listen back on something more XDCAM compatible like Adobe Premiere, it sounds like a more true stereo mix. So my understanding is that it really comes down to how the dual mono tracks are panned. My question is whether it is my responsibility to manually pan them or will the recipient/preference have control over that?

just curious but....
- where did you get the XDCAM plug in? Did it come with FCP7?
- is the file you created for a telestream server?
- how did you insert the CC file into FCP?


Thanks
Phil