On a multichannel automated analyzer, controls are performed every 8 hours. On a 4:00 PM run, all levels of hemoglobin control read 2 g/dl more than the upper limit of the acceptable range. The technologist checks the last 10 patient results and notices that the delta checks on most of the hemoglobin values are 1.8 to 2.0 g/dl more than previously reported. 1. What do you call the type of error detected in this case? 2. Can you continue to run patient specimens as long as you subtract 2g/dl from the results? 3. What should you investigate when troubleshooting this