It's a DSP rig. That would explain the difference, then, since the Yacht Boy 400 that I attempt DXing with* is most certainly not a DSP radio! If you're hearing the analogue sidebands 100 kHz out and the Ibiquity 200, its front-end must be set a bit narrower than what I have.
What did you say it was again, a G-8?
[size=8pt]_______________________________________
* It's actually the more sensitive of the couple portable rigs I have access to at the moment. My original 15-year old DX-375 is just hanging on by a very thin thread, and is stone-deaf on FM to nearly everything except moderately-strong locals. (It used to be a pretty decent FM rig years ago, but it's been subjected to a few encounters with hard surfaces, mainly tile and hardwood floors, during its lifetime.) Even when I have it set to 9/100 (instead of the default 10/200) it also pulls in the Ibiquity channels 300 channels out, hence 106.2. I guess it must just be the way those older non-DSP Grundig dinosaurs were designed.