Analogue-sequencer

The past two gigs, I've experienced a bit of "user error" on my part
as I've outfitted my master controller (a JD-800) with its volume
controller and hold pedal and added the JV-1080 as a module. 

Even though the controllers are a standard part of my JD-800 setup, I
evidently have not had my P3 config setup as it is now, or managed to
avoid these problems through dumb luck, or the OS updates have changed
something, or the JV-1080 operates differently than the other modules. 

Anyway, help troubleshooting would be appreciated.

Setup: Roland JD-800 w/volume controller and hold pedal MIDI OUT to P3
MIDI IN. P3 MIDI OUT to Roland JV-1080, Emu Morpheus, Novation Nova,
Korg Electribe ER-1.

What I'm trying to do is have the P3 pass-through MIDI info when in
REC or EDIT mode only to the track selected (no matter what MIDI
channel is outputting on JD-800) and not pass MIDI when REC or EDIT is
off. 

What I'm experiencing that I don't remember from before is:

1) Without REC being on (either in READY or LIVE or EDIT), the JV-1080
receives note and controller info from the master keyboard.

2) MIDI Volume is being conveyed (can't tell if it's local or global
yet), so that where ever I leave the volume pedal passes through to
the P3, unintentionally reducing some tracks to zero volume and
messing others up after I've set a balance with the mixer knob on the P3.

So, I'm just trying to suss out the logic of the system so I can
either use this configuration better or turn some things off (on the
P3 or JD-800) to prevent the behavior.

Any ideas?

-Jim