See the attached screenshot.
I am tuned to CHU, but offset the Spectrum Analyser dial frequency.
I enabled Peaks and Marker A (it is covering one of the Peaks).
The visible (green bubble) Peak is in error. I presume it will report to the Data Dump in the same fashion.
The Data Dump will report the wrong dBm and the wrong frequency.
It appears the Peak is not locating the highest value of dBm available.