BSSID is formed from the MAC address of the station that creates it.
For infrastructure mode, this is typically the same as the mac address
of hte AP.  For IBSS mode (which is what mediaopt 'adhoc' really
means), the BSSID is formed by xoring 20:00:00:00:00:00 with the MAC
address.  So wlanctl reports a node for the interface's own address,
but not one for the bss (flags 0001), which is odd - did you omit
that?

ath0 ifocnfig shows both address and bssid.  This all looks fine.

wlanctl is reporting the rate set for the node.  6 is perhaps the rate
chosen by the rate control algorithm, which in this node's case is
probably not used, or if on the bss node entry perhaps the rate used
for multicast traffic.

-- 
        Greg Troxel <gdt@ir.bbn.com>