Bonuses advanced and then rescinded: Does that threaten MFLSA exempt status?

Q. Our bonus plan states that employees eligible to receive bonus pay will receive bonus advances with each paycheck based on year-to-date performance results. Last year, we were on track to meet the maximum bonus throughout most of the year, but the last few months of the year were slow and we didn’t meet our target goal. As a result, we deducted certain amounts from the last few paychecks of salaried employees. Do these deductions threaten the exempt status of the salaried employees?