No, this isn't it. I have two hr24s in an MRV setup. I use one DVR/TV (for viewing) the majority of the time and have Quick Tune channels set up on it. The other DVR has none - when I push the "up" button, all the entries are empty.
If it did do as you describe, I would consider it a bug. Not every viewer (and with multiple TVs, there are often multiple viewers) has the same favorite channels. OTOH, if it offered the option of populating the other, that would be a feature.