Thanks to everyone for your replies. I have gone through and calibrated a few more times to see what what would happen. The spike on the color tracking page is no longer happening. Originally the spike showed up and was still there even after calibrating the monitor 3 times.
So I was concerned.
Tested yesterday using a ColorMunki Photo, i1Display2 and the NEC Wide spectrum unit that came with my friends PA301W monitor. Was curious to see if I could notice a difference when the PA271W was calibrated wwith each device. In the next week or so, will find 5 images as a test and calibrate using each device to see what I can see.
Again, thanks very much, always something to learn from the great bunch here at Luminous Landscape forum.