Rule execution bug

For the next schema rule "d_analysis_plan" perform only first DELETE
statement, second statement not performed.

Environment:
---------------------------------
PostgreSQL 7.4beta4
CPU: 2PIII800
ASP Linux 7.2 2.4.19-13 smp
gcc 2.96

SCHEMA:
------------------------------------------
create table gl.T_ACCOUNT (
ID                   INTEGER                        not null,
PLAN_ID              INTEGER                        not null,
CODE                 ltree                          not null check (
CODE != ''::ltree),
DESCRIPTION          VARCHAR(255)                   not null check (
DESCRIPTION != ''),
STATUS_ID            INTEGER                        not null,
VERSION              SMALLINT                       not null
);

create table gl.T_ACCOUNT_PLAN (
ID                   INTEGER                        not null,
CODE                 VARCHAR(17)                    not null check (
CODE != '' ),
DESCRIPTION          VARCHAR(255)                   not null check (
DESCRIPTION != ''),
VERSION              SMALLINT                       not null
);

create table gl.T_SUB_PLAN (
ID                   INTEGER                        not null,
ACCOUNT_ID           INTEGER                        not null,
MIRROR_ID            INTEGER
);

alter table gl.T_ACCOUNT
    add constraint FK1_ACCOUNT foreign key (PLAN_ID)
       references gl.T_ACCOUNT_PLAN (ID);

alter table gl.T_SUB_PLAN
    add constraint FK1_SUB_PLAN foreign key (ACCOUNT_ID)
       references gl.T_ACCOUNT (ID);

alter table gl.T_SUB_PLAN
    add constraint FK2_SUB_PLAN foreign key (ID)
       references gl.T_ACCOUNT_PLAN (ID);


CREATE RULE d_analysis_plan AS  ON DELETE TO analysis_plan DO INSTEAD
(DELETE
    FROM gl.t_sub_plan
   WHERE (t_sub_plan.id = old.id );

  DELETE
    FROM gl.t_account_plan
   WHERE ((t_account_plan.id = old.id )
     AND (t_account_plan."version" = old."version" ));
);