특정 게시판에서 게시판 스킨을 이용하여 글쓰기를 하면 정상으로 나오는데요..

게시판 스킨이 아닌 다른 페이지에서 게시판에 입력하기 위해
이 게시판의 DB로 값을 넣으면
그 값들은 게시판 숫자가 -1, -2 이렇게 늘어납니다.

아래와 같이 DB에 넣엇는데요...왜 그럴까요?
게시판 숫자 카운터 재정렬을 하면, 올바르게 되는데, 
다시 DB에 인서트 하면 -1, -2 이렇게 증가합니다. 
 
도와주세요..

 if ($member[mb_id])
    {
        $mb_id = $member[mb_id];
        $wr_name = $board[bo_use_name] ? $member[mb_name] : $member[mb_nick];
        $wr_password = $member[mb_password];
        $wr_email = $member[mb_email];
        $wr_homepage = $member[mb_homepage];
    }
   
 
        $wr_num = get_next_num($write_table);
        $wr_reply = "";
 
   

    $sql = " insert into $write_table
                set wr_num = '$wr_num',
                    wr_reply = '$wr_reply',
                    wr_comment = 0,
                    ca_name = '$ca_name',
                    wr_option = '$html,$secret,$mail',
                    wr_subject = '$subject',
                    wr_content = '$content',
                    wr_link1 = '$wr_link1',
                    wr_link2 = '$wr_link2',
                    wr_link1_hit = 0,
                    wr_link2_hit = 0,
                    wr_trackback = '$wr_trackback',
                    wr_hit = 0,
                    wr_good = 0,
                    wr_nogood = 0,
                    mb_id = '$member[mb_id]',
                    wr_password = '$wr_password',
                    wr_name = '$wr_name',
                    wr_email = '$wr_email',
                    wr_homepage = '$wr_homepage',
                    wr_datetime = '$g4[time_ymdhis]',
                    wr_last = '$g4[time_ymdhis]',
                    wr_ip = '$_SERVER[REMOTE_ADDR]',
                    wr_1 = '$email_subject',
                    wr_2 = '$tempelete_id',
                    wr_3 = '$member_id',
                    wr_4 = '$wr_4',
                    wr_5 = '$wr_5',
                    wr_6 = '$wr_6',
                    wr_7 = '$wr_7',
                    wr_8 = '$wr_8',
                    wr_9 = '$wr_9',
                    wr_10 = '$wr_10' ";
    sql_query($sql);

$wr_id = mysql_insert_id();

    // 부모 아이디에 UPDATE
    sql_query(" update $write_table set wr_parent = '$wr_id' where wr_id = '$wr_id' ");

    // 새글 INSERT
    //sql_query(" insert into $g4[board_new_table] ( bo_table, wr_id, wr_parent, bn_datetime ) values ( '$bo_table', '$wr_id', '$wr_id', '$g4[time_ymdhis]' ) ");
    sql_query(" insert into $g4[board_new_table] ( bo_table, wr_id, wr_parent, bn_datetime, mb_id ) values ( '$bo_table', '$wr_id', '$wr_id', '$g4[time_ymdhis]', '$member[mb_id]' ) ");

    // 게시글 1 증가
    sql_query("update $g4[board_table] set bo_count_write = bo_count_write + 1 where bo_table = '$bo_table'");