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ADF4113 convert V to dbm

I am conused withe the descriotion in the ADF4113 datasheet. Could anyoneone clarify and give me any advice?

In the ADF4110/ADF4111/ADF4112/ADF4113 Rev,F datasheet on page 3, the Reference Input Sensitivity is specified as 0.4/AVDD V p-p min/max for AVDD = 3.3 V and 3.3/AVDD V p-p min/max for AVDD = 5V.
Isn't it 0.4 / 3.3(=AVDD) V p-p min/max for AVDD = 3.3V and 3 / 5(=AVDD) V p-p min/max for AVDD = 5V?

I did convert V to dbm.

It case,
AVDD=3.3V : 0.4 / 3.3(=AVDD) V p-p min/max → -3.979dBm / 14.349dBm
AVDD=5V : 3 / 5(=AVDD) V p-p min/max → 13.521dBm / 17.958dBm

However, It is different operating rage.
AVDD=3.3V : 0.4 / 3.3(=AVDD) V p-p min/max → -8dBm / 20dBm
AVDD=5V : 3 / 5(=AVDD) V p-p min/max → -4dBm / 20dBm

I know wrong, but I don't know reasons.

Please. Can someone tell me?

Best Regards