WiFi settings lock in Manual

My wifi settings is locke out from me beaing able to change channel, set it to Automatic or anything. Anyone have a clue how o unlock the settings so i can change it ? All my neibhors are on the same channel and my WiFi is horrible due to that. Not sure why Xfinity have it on channel 11 for me and ALL other people around me ( all togheter nother 12 WiFi around me are on the same channel).