MIAMI — Minutes after 12 Miami federal jurors agreed to convict a former British Virgin Islands premier of a drug-trafficking conspiracy, two of them contacted the judge to tell her they really didn’t share the views of the other panelists and changed their minds about the defendant’s guilt. But it was too late. U.S. District Judge Kathleen Williams had already polled each of the 12 jurors on their unanimous verdicts and discharged them after each said Thursday that Andrew Fahie was guilty of conspiring to import cocaine into the United States and three related money laundering and racketeerin…