Why position of racers in this track not in order?

"Lane" refers to which lane they raced in (there are 8 lanes on a track). The racers start on a staggered start, as the inner lanes are shorter distances otherwise. In the 200m race the racers will not switch lanes - they'll stay in the same lane the entire time. See the rules here.

Beyond being informative as to which lane they raced in, that column is not useful - it is not related to the rank they finished in - and so it is not used to sort.