That's bizarre; wlan0:9 is a virtual wireless interface operating over wlan0. For several years now, Linux has supported 'virtual network interfaces'. For every real interface you have (eth0, wlan0, etc etc), you can also run virtual interfaces (wlan0:0, wlan0:1 and so on).
Unless there is some need to run that virtual interface on your system, you should go through the network configuration files and fix them up so that you just get your normal wan0 (and of course, it should work).
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