My wife verified (again via hhonors USA) that She has already diamond qualified for all of 2019 (till Mar 2020) and if we complete a few more stays it will "roll over" to Mar 2021 (mentioned because she was fast tracked to Diamond on some kind of challenge earlier this year and hence she gets this roll over)

This is not how things work on the airline schemes and wanted a sanity check with this forum (I do not care much for hotels when I am business travelling, just a bed and shower and location so all this is new to me. I was not on the phone with her to Hhonors as was travelling last 2 weeks, 4 continents, she is not native english speaker)