Hi
as far as i know, IELTS score is valid for 2 years, so they might ask u for another (3rd) IELTS test report, if 2 years have passed from your second test
1. As long as the IELTs results were submitted with the application or within 2 years of the date of the application, then they remain valid for life of the application.
2. The OP most advantageous IELTs result will be used.