What are your sound sources? Some like Kontakt may ignore the track volume and pan and play the track at it's preset volume and pan. That is unless you put a CC7 and CC10 at the start of the track. I always have a blank measure or two at the start of a song that I put my initial volume, pan and any other setting.

Bob's advice is especially true on MIDI DLed from the Internet. Settings for one track may be hidden in other tracks.

Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware