Can an employer deduct money from an employee's paycheck.
In this case an employee made a mistake and a aide worked 2 hours
over the time she was allowed. The employer wants to deduct the aides
pay from the clerical staff. We are located in North Carolina. The employer has sent memo's out stating she will deduct this if this happens and we have to read the memo and intial the memo does this make us reliable for there
pay.

No, the kind of deduction you describe is not legal under the law, You cannot sign away your rights under the law.

You CAN be disciplined, up to and including termination; just not by payroll deduction.