The administration has talked for more than a year about cutting 1,750 jobs from the executive branch work force to cope with Massachusetts budget deficits, but it's still short of its goal even as tax collections continue to languish. An official tally released Tuesday at the request of The Associated Press shows 1,620 jobs had been cut as of Oct. 10, the end of the state's most recent payroll period.Of those, only 726 came through layoffs. And 129 of those layoffs were made during the most recent pay period. The rest of the cuts came through attrition or voluntary departure programs.