Broken connection after adding wireless clone?

[srynoname]

I am using an atheros AR9280 based atheros card. I use this card in infrastructure mode. recently I added a wireless clone, used as access point. As soon as I did this, the infrastructure connection wasn't working anymore (though it was not shown as disconnected). For the wireless clone I did nothing except configuring the WLAN (SSID, encryption…), it yet had no IP and no firewall rules. Any idea why this breaks my infrastructure wlan? Thanks :-)

Update:

1. wireless log showed

hostapd: <interface>: IEEE 802.11 Fetching hardware channel/rate support not supported.</interface>

2. after rebooting all connections suddenly work, though the mentioned log entry still appears.