ddod:
I guess my point is that if you say your device supports 802.11b/g/n that implies that it can run in all three of those modes. 802.11b/g/n itself is not a standard. It represents three separate standards. Marketing has shortened it by saying 802.11b/g/n when a device supports all three standards.
According to the spec sheet for that module, it does support b/g/ and n.
It also supports WEP and WPA/WPA2–PSK, so I don't know what to tell you.