First, when responding, please quote the pieces you're responding to for me. You can use the Quote option at the top of the reply box, just so I know exactly what you're saying and what I'm saying
You are confusing CC messages and Note messages. Here's how they work:
Note messages have actual note values. Like C1 or B#5, etc. So 05 is F-1, correct.
CC messages do NOT have corresponding note values. A CC value of 05 (in hex) is 05, 100% of the time. a CC value of 0A (in hex) is 10. A CC value of 40 (in hex) is 64. So you won't be able to compare notes with CCs like that.
If you see a message like 90 05 7F it means:
Note On message
Channel 1
Note F-1
Velocity 127
If you see a message like B0 05 7F it means:
CC Message
Channel 1
CC05
Position 127
They are two different kinds of messages, and have different meanings, even though they are formatted similarly. That first character (9 or B) is very important.
There are resources that will talk about what CC messages do and, in fact, when you enter certain CC messages into MIDI Translator it might give you a meaning beyond the actual CC number. That's not important anyone, not for what we're talking about. There is no universal "Master Tempo" CC message that will work in Ableton no matter what. There are no requirements anymore. Note commands aren't reserved for actual keys on a keyboard anymore. CC messages aren't restricted only to knobs. They can be interchangeable and do whatever you want, as long as the software allows.
Ableton has some restrictions, and understandably so. You are better off using CC messages for most knob controls, and Note messages for most button controls. So we are going to focus almost exclusively on CC messages in Ableton.
I can't tell you what CC message will control the Cue Volume, because you get to decide what those are and map them yourselves. You copied the previous translator we used to map the master tempo, and changed the input command. That's halfway there. If you don't change the outgoing message in the new translator, then it's going to send the same CC to both the Cue Volume and the Master Tempo. Hence it will move both of them. In fact, I'd bet the Master Tempo buttons on your Spectra will also move the Cue Volume the way you have it set up.
So you need to assign a different CC message to the output of the Cue Volume translator. It should be different from the CC message for the Master Tempo Translator.
And to be 100% clear:
The Note messages have a reference sheet because they are clearly defined as musical notes. CC messages are only defined as their numerical value, as far as we are concerned. There are some VSTs where this might be different, but for what you're doing it's not important and will only confuse us all. Does this make sense?
Jared