OK. That makes already 4 Win7 64bit user, that get meaningless RGB values in the Advanced Color Editor. Maybe we should start a new thread, and ask other win7 users?
We filed a case.
Did you? Maybe you should, don't know. It appears to be a bug.
I checked my Vista 64b system and it has the same issue.
I don't really have time to create a case with C1 but I think I know what's happening. I don't have time to create any screenshots so I'll try to describe;
It's recording the value of the height of the level histogram of the colours that the picker is on...
Open your levels tool and select the red histogram
Select your advanced colour editor and the picker then click on the red box on your colour checker image
Look to see where in the level histogram the indicator falls
Now look to see how HIGH the histogram is at the point (make a % estimate with 100 being the box max)
Switch to the blue level hitogram then hover back over the red box on your colour checker.
The indicator is now at a completely different place in the histogram (lower of course)
But look to see where the indicator intersects the height of the level histogram
Repeat for the Green
You should find that the numbers you jotted down are approx what you have in the advanced colour editor box.
Give that a try and see if you get the same.