Qual is set to 0 in the server config file, meaning no qualifying. So I don't know what other setting might be allowing it. Maybe delta or Jacques want to take it from here
I think that when someone sets a qualifying time on server using !qu it changes the config to allow voting, command !qu 0(zero) has to be applied to cancel voting.
On other topic i said to cancel qualifying it was !qu=0, i was wrong it is !qu 0, it then sets qualifying to 0 minutes, the same as no qualifying.