A Select Board election in Clifton is still undecided after two previously-uncounted absentee ballots were challenged and sent to Maine’s highest court for a second time. The ballots, which were opened during a meeting Wednesday but not certified, will flip the outcome of a single-year Select Board seat if the court finds they were cast legally. Cynthia Grant, a former town manager, beat Steve Armenia by a single vote in Clifton’s March 24 elect…