Yes, if I click on the gray card, all the (three) numbers are the same. My new card has four wide bars of color: White, light gray, middle gray and darker gray. When I click on all four the numbers are all the same but different when I go to another bar or even another area within the same bar -- but still all three are the same for each 'click' or spot.
Depending on where on the bar I click the numbers are different. For example, if I choose the middle gray bar and click on it the numbers range from 170, 170, 170 down to 156, 156, 156, depending on where exactly on the bar I click. How can this be if the color is consistent within each bar? I guess the light falling on different areas affects the numbers.
So I took one of those readings, 165, 165, 165, and looked at color temp values. That translated to amber-yellow 5450 and red-green at -18. So I plugged those into a photo in that series and the photo is super red.
It's the same on both of my monitors, studio and home.