Hi, I use airodump-ng to sniff wireless connections but I have some problems:

1) in the upper left-hand corner of the display the value of CH changes between 1 and 11
2) in the second half of the display ( where BSSID,STATION,PWR,Lost,Packets and Probes are highlighted ) there are not the MAC ADDRESSES of STATIONs with WEP,WPA or WPA2 Encryption .
Is it normal ? I cannot capture the WPA Handshake to test the strength of my WPA.
Can you help me?
thanks