Don't use the -d (the debug) flag.
The output is telling you that for your circuit, the average noise-floor is -118 dBm/Hz per sub-carrier. Should it change from that value, a more positive result (say -110 dBm/Hz per sub-carrier) indicates that the circuit has become noisier, a more negative result (say -120 dBm/Hz per sub-carrier) indicates the the circuit has become quieter. It is not a precise measurement, just a useful guide.
At the beginning of this month, the average noise-floor was determined to be -129 dBm/Hz per sub-carrier. A moment ago it was determined to be -128 dBm/Hz per sub-carrier. I.e. a little bit noisier. I am not concerned by that change, it is quite normal.
As a point of reference, the noise floor for a basic telephony circuit (i.e. that over which we have an xDSL service operating) is -140 dBm/Hz.