I am running for moderator in the EL&U election.
I can vote for myself in the final stage of the election. I couldn't vote for myself in the primaries. Is this a feature or a bug?
It follows life.
Turning up for the primaries as a candidate is your self vote for yourself.
Then, just like in regular real-life elections (which may or may not be run by a junta (and which may or may not be on a day designed to have maximum voter turnout)), you can cast a ballot in your favour when it comes down to the final straw of elections.