1 | initial version |
Capturing on the same interface in monitor mode while also attempting to use in managed mode usually yields unusual results. In your particular case, frames sent from the adapter will not likely contain all the radiotap information that is available due to the fact that the capture occurs prior to transmission, so actual datarate, MCS index, signal strength, encryption key, encoding, etc. is not available yet.
Always best to use a separate adapter for capture so that you are not evaluating with the same tool as you are testing with. This is generally true in many areas, but particularly true here.