Two votes cast at last month's Democratic 5th Congressional District nominating convention have been nullified.  Officials say the votes were cast by members of the New Britain delegation, but did not change the outcome.  Mary Glassman remains the endorsed candidate.  Jahana Hayes only lost by two votes and will be on the primary ballot.  The panel of Democratic State Central Committee members recommends that the party work to design a better process for recording votes at conventions and reconsider whether to offer a vote change option.  Democrat Shannon Kula is seeking to petition her way onto the ballot.