[Wire Nut]

I agree with n0qcu, haven't found a way to call out a specific tuner for recording. Unless you have cable issues the three tuners should work equally well for watching/recording.
The caller ID is interesting, every system I have connected the CID works on the Joeys as well. What is your setup? 1 or 2 Hoppers? Did your installer use isolators? And WTH do you still have a landline phone anyway lol...

 

[Wire Nut]

IDK about the caller ID, I've seen it work with Joeys many times with wired phone connections but never a VOIP service, maybe that is the issue? You may consider getting another Hopper, so Hopper/Hopper/Joey to free up more tuners, as well as get caller ID on another TV. Monthly bill should be the same, just a one time upgrade fee ($150?) for the other Hopper.