When problems forced the closure of Martin Luther King Jr.-Harbor Hospital, the Los Angeles County government leaders blamed their own employees. When the hospital ended inpatient and emergency operations a year ago, county supervisors promised to "wipe the slate clean" of problem employees. But a review of personnel data and disciplinary appeals shows that at least 22 employees with significant disciplinary histories at King either still work at what remains of the facility, or have been reassigned to other county hospitals. It is not known exactly how many problem employees from King are on the job.