Hi there!
Sometimes when I add a vocabulary card or search it in the browser, I see that I’ve already learned it. If I had seen it during the review, I would have pressed “Again” which would decrease the ease and recalculate the interval. It would be useful to have an “Again” button in the card’s context menu in the browser. “Forget” doesn’t work well. If the card’s ease is equal to 200%, the “Forget” button make it 250% and a card, of course, is not a “new” de facto.