"last practiced" on word tab looks wrong
apparently i last practiced "puedo" four months ago. that would be 120 days back into my 144 days of duo life.
"last practiced" must not mean what i think it means. you can't go a day without typing "puedo" in the spanish tree.
there are many words that look wrong to me. i just grabbed a really egregious one as an example.
if this is right then i would guess that a word is "practiced" only when duo presents a question to specifically test that word. rather than treating every correctly used word as "practiced". if that were true, then the flash card scheduling would set you up to a do a lot of completely unnecessary reviewing.