I have just completed my first MTD VAT return using QuickFile. I have registered with HMRC for the pilot and hopefully setup QuickFile but haven’t received any acknowledgement from HMRC when I click Submit. I have enclosed some screen captures.
Your second screenshot shows “Saved”, suggesting this was through the older submission process rather than the MTD one.
What I would do, is rollback that VAT return, and then try to submit another one. It should prompt you for a period matching it up with HMRC. Ensure your account is linked (Reports >> HMRC), where you can see any periods HMRC are expecting, as well as payments relating to MTD returns.