LEFT SEMI/ANTI JOIN wrong answer

[chaoyli]

TPCDS qualification query16 and query94 use LEFT SEMI/ANTI JOIN, but the answer is wrong.

[chaoyli]

-- query 16
select
   count(distinct cs_order_number) as "order count"
  ,sum(cs_ext_ship_cost) as "total shipping cost"
  ,sum(cs_net_profit) as "total net profit"
from
   catalog_sales cs1
  ,date_dim
  ,customer_address
  ,call_center
where
    d_date between '2002-2-01' and
           date_add(cast('2002-2-01' as date), 60)
and cs1.cs_ship_date_sk = d_date_sk
and cs1.cs_ship_addr_sk = ca_address_sk
and ca_state = 'GA'
and cs1.cs_call_center_sk = cc_call_center_sk
and cc_county in ('Williamson County', 'Williamson County',
                  'Williamson County', 'Williamson County',
                  'Williamson County')
and exists (select *
            from catalog_sales cs2
            where cs1.cs_order_number = cs2.cs_order_number
              and cs1.cs_warehouse_sk <> cs2.cs_warehouse_sk)
and not exists(select *
               from catalog_returns cr1
               where cs1.cs_order_number = cr1.cr_order_number)
order by count(distinct cs_order_number)
limit 100;

The right answer of query16 is

+-------------+---------------------+------------------+
| order count | total shipping cost | total net profit |
+-------------+---------------------+------------------+
|         236 |          1062963.89 |       -214910.61 |
+-------------+---------------------+------------------+

But now the answer is

+-------------+---------------------+------------------+
| order count | total shipping cost | total net profit |
+-------------+---------------------+------------------+
|         213 |           767460.44 |       -187341.31 |
+-------------+---------------------+------------------+

[chaoyli]

-- query 94
select
   count(distinct ws_order_number) as "order count"
  ,sum(ws_ext_ship_cost) as "total shipping cost"
  ,sum(ws_net_profit) as "total net profit"
from
   web_sales ws1
  ,date_dim
  ,customer_address
  ,web_site
where
    d_date between '1999-2-01' and
           date_add(cast('1999-2-01' as date), 60)
and ws1.ws_ship_date_sk = d_date_sk
and ws1.ws_ship_addr_sk = ca_address_sk
and ca_state = 'IL'
and ws1.ws_web_site_sk = web_site_sk
and web_company_name = 'pri'
and exists (select *
            from web_sales ws2
            where ws1.ws_order_number = ws2.ws_order_number
              and ws1.ws_warehouse_sk <> ws2.ws_warehouse_sk)
and not exists(select *
               from web_returns wr1
               where ws1.ws_order_number = wr1.wr_order_number)
order by count(distinct ws_order_number)
limit 100;

The right answer of query94 is

+-------------+---------------------+------------------+
| order count | total shipping cost | total net profit |
+-------------+---------------------+------------------+
|          33 |            64554.35 |         -3979.35 |
+-------------+---------------------+------------------+

But now the answer is

+-------------+---------------------+------------------+
| order count | total shipping cost | total net profit |
+-------------+---------------------+------------------+
|          23 |             53594.6 |        -10049.75 |
+-------------+---------------------+------------------+