Issue resolved. Restarting Afterburner and RTSS corrected the problem. As of 10/21/2019-PDT, MSI Afterburner stopped recognizing core clock "profiles", that have been saved and left untouched for months. What is occurring now is core clock is stuck permanently at maximum of 1030Mhz, and not recognizing any of the (5) profiles that are saved. Because I work in a warm environment, I under-clock my AMD R7 200 Series (2GB) card to minimize overheating. Please advise your comment, and thanks in advance!