Correlated color temperature (CCT) alone doesn’t tell you the whole story – two completely different hues can have the same CCT. It seems in your case the calibrated whitepoint is a bit away from the daylight locus. Technically that is not a problem, and may not be reason for concern as long as white looks neutral to you in your viewing environment.
Thanks Florian and well done for creating such a good interface. With this Dell internally calibrated monitor I was never able to calibrate to D65 using Dell software, in the past I would get blackbody locus, now I got this result. Anyway if as you say it is not a cause of concern I will leave it as it is.
BTW when profiling with DisplayCal when you recommend using BPC on or off?