Vectorized auto_smb_mapjoin_14.q produces different results

select count(*) from (
  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
) subq1

select src1.key, src1.cnt1, src2.cnt1 from
(
  select key, count(*) as cnt1 from 
  (
    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
  ) subq1 group by key
) src1
join
(
  select key, count(*) as cnt1 from 
  (
    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
  ) subq2 group by key
) src2

0	3	3
2	1	1
4	1	1
5	3	3
8	1	1
9	1	1

0	9	9
2	1	1
4	1	1
5	9	9
8	1	1
9	1	1