I made some changes in lines 49-68 and now all calculates correct. Yes, I know, that my solution a little dumb, but it works
$j=0;
foreach($comments as $comment) :
$j=$j+1;
for($i=1; $i<=cwppos("cwppos_option_nr"); $i++) {
if (get_comment_meta( $comment->comment_ID, "meta_option_{$i}", true)!=='') {
${"comment_meta_option_nr_".$i}++;
${"comment_meta_option_".$i} = ${"comment_meta_option_".$i} * ($j-1) + get_comment_meta( $comment->comment_ID, "meta_option_{$i}", true)*10;
}
//var_dump(${"comment_meta_option_".$i});
}
for($i=1; $i<=cwppos("cwppos_option_nr"); $i++) {
if (get_comment_meta( $comment->comment_ID, "meta_option_{$i}", true)!="")
${"comment_meta_option_".$i} = ${"comment_meta_option_".$i}/${"comment_meta_option_nr_".$i};
}
endforeach;
Maybe someone will found it usefull