The ladder is still fresh , i am not laddering when the ladder is fresh anyone with the basic skills can reach there,this is a well known cheap tactic you get an easy or lucky winning streak about 25 against noobs in the early times of the ladder you only beat 20-30 battles witch allows huge possibility error , then you never use that alt again and call them self ,masters
i don't know how the upper ladder is right now but if the one in the #1 is a trully good player then he must be able to keep his position after a big amount of games 100-110
but most of all not when the ladder is still recovering/forming up