SUBSCRIBER IMPORT: Opt-out notification message?

Screencap: https://snag.gy/pDlx3w.jpg First off: "You may not use FeedBlitz as the sender..." then why did FeedBlitz populate that field? Second: Where did all the text I entered into the Text Fields go? Why did FeedBlitz clear those fields when showing me a system error? Why not evaluate the input fields and display any errors before refreshing that page?