I've found that if you are running WSJT-X the frequency that's reported for Rx messages can be incorrect. This happens if you use the tune knob on the transceiver to adjust the frequency. WSJT-X knows about the frequency change, it displays it on the screen and uses it for transmits but still reports it incorrectly to PSKReported and in the ALL.TXT file. It's OK if you use WSJT-X to set the frequency but it's often easier to twiddle the VFO knob.
I've reported it to the WSJT-X developers, but don't know when it will be fixed.
Chris, G5CTH