How to export dump of some schemas exclude some tables
Afaik, that syntax never worked like that, I am surprised EM generated this (well, not really...)

grant dba to bp1 identified by bp1;
grant dba to bp2 identified by bp2;
create table bp1.t1 as select * from dba_users;
create table bp1.t2 as select * from dba_users;
create table bp2.t1 as select * from dba_users;
create table bp2.t2 as select * from dba_users;

$ cat exp1.par
schemas=BP1,BP2
exclude=table:" in ('"BP1"."T1"', '"BP2"."T2"')"


This does not work as expected, because the database compares the given strings to table_name and that does not include the owner:

$ expdp \'/ as sysdba\' parfile=exp1.par
...
Processing object type SCHEMA_EXPORT/TABLE/TABLE
. . exported "BP1"."T1"                                  19.07 KB      27 rows
. . exported "BP1"."T2"                                  19.07 KB      27 rows
. . exported "BP2"."T1"                                  19.07 KB      27 rows
. . exported "BP2"."T2"                                  19.07 KB      27 rows
Master table "SYS"."SYS_EXPORT_SCHEMA_01" successfully loaded/unloaded
******************************************************************************


If you do this:

$ cat exp2.par
schemas=BP1,BP2
exclude=table:" in ('T1', 'T2')"


This excludes the tables, but from all schemas:

$ expdp \'/ as sysdba\' parfile=exp2.par
...
Processing object type SCHEMA_EXPORT/USER
Processing object type SCHEMA_EXPORT/SYSTEM_GRANT
Processing object type SCHEMA_EXPORT/ROLE_GRANT
Processing object type SCHEMA_EXPORT/DEFAULT_ROLE
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
Master table "SYS"."SYS_EXPORT_SCHEMA_01" successfully loaded/unloaded
******************************************************************************


What you can do is, specify the QUERY parameter with a condition that evaluates to false for the tables to be skipped. This will still export the table, but without any data (0 rows).

$ cat exp3.par
schemas=BP1,BP2
query=BP1.T1:"WHERE 1=0"
query=BP2.T2:"WHERE 1=0"

$ expdp \'/ as sysdba\' parfile=exp3.par
...
Processing object type SCHEMA_EXPORT/TABLE/TABLE
. . exported "BP1"."T1"                                  14.99 KB       0 rows
. . exported "BP1"."T2"                                  19.07 KB      27 rows
. . exported "BP2"."T1"                                  19.07 KB      27 rows
. . exported "BP2"."T2"                                  14.99 KB       0 rows
Master table "SYS"."SYS_EXPORT_SCHEMA_01" successfully loaded/unloaded
******************************************************************************