Well maybe I confused you with the word 'rounds' (probably not proper english then, I presume). I meant that in this situation the runner has legally touched 2nd base and between 2nd and 3rd base he can see the ball is cought and the ball goes dead. But the only 'missed base'/'left' is 1rst, he has touched 2nd base. So he has progressed one base ahead of the missed base, because he did touch second base, and in my opinion he therefore cannot return to first base to retouch. If the defensive team make a proper appeal the runner should be declared out.