coinmaster32,
You are sort of going in circles on this. When you have 2 DVRs on a MRV setup you have to program each DVR separately; you cannot do it over the MRV network. (With an HD receiver and DVR you can control the recording from either the receiver or the DVR.)
If you want both DVRs in the same room (as was discussed in a another thread a few months ago) you probably need to set the remotes to RF mode since it seems there are issues trying to control multiple DVRs close together with the IR setting.
You always have the option of programming each DVR via D*'s online website. I use it all the time to setup recordings for my bedroom DVR when I am in the front room. I also use the website to program my front room DVR when I am on the road in our RV (where I use our bedroom DVR).
As noted, each DVR has 2 tuners. If you want to watch something live, that consumes 1 tuner. That leaves 3 to record other shows. If you want to record 4 shows, and you want to watch something, you have to watch something that was recorded.
Hope this helps,
Bob