I solo this track and the output level seems normal. But the Bus it's sent to knocks it down too far. All settings are normalized.
 
Is this normal?
 

No its not normal. I don't know what you might have in the PC to adjust level. Unless you some how have pre fader set for the meters. Don't forget Offset mode. 

No PC. No Offset mode. No Pre fader. No FX. All sources are dry, direct and set neutral.
 
I created a new bus and set it up the same and it works like it should, so, there is something funny going on with the existing busses.
 
I will have to replace them all with new ones. I just can't figure what would cause this.

Its a mystery to me. You did a good job of making the issue clear. 

Try sending it via the SEND at the console, and turn off the write function.
Track Send to Bus, Bus Send to Master?
What are the ins and outs shown on your view?
I assume it is the Dry signal, make it full wet.
DMPX, Dry and Mix Level?
Mine might read Guitar Track...(Guitar Input)...to (Guitar Bus)...to Master 

I have similar issue with this. When i select a strip in the bus it doesnt reflect in the inspector. Creating new bus is the only solution. Im uploading the video at youtube right now . Ill post the link when its done.

Here's the link. http://youtu.be/Q3n_nhFrhDA

I vaguely remember there being an option to lock the inspector so it didn't change, but I may be mistaken.
 
I'll have a look next time I'm at my DAW.

From the reference guide:
 
"
To unlock the track or bus, select
Lock the current track or bus from the menu again."

I guess the busses were bad. I replaced them and all is fine ... for now.