Sometimes if you are the only user in the channel , and try to oper override to get mode, it deops you so try to join in the channel with another client too, and then try to op yourself to see what happens.
I would suggest /msg chanserv set #channel secureops off but i think this setting is deactivated anyways.
I am pretty sure your nickname is not identified. Try the full command /msg nickserv identify password because maybe your aliases are not working. As soon as you have identified correctly you will get +oq from chanserv.