Maybe I'm reading this wrong. The following image is from the Oklahoma Secretary of State website. Entity Summary Information on THE CORETEC GROUP INC.
Registered Agent Information. Name: NATIONAL REGISTERED AGENTS, INC. Effective: 18 May 2026 This should say who their current RA is and the date. If this is about the agent who resigned, the date should reflect the day that he/she started. This looks to me more like one resigned and another took over, but I might be reading this wrong.