Schema issue while storing multiple pig outputs using CSVExcelStorage

I have a script which stores 2 relations with different schema using CSVExcelStorage.

The issue which i see is that the script picks up the last store function and takes the schema in that and puts it for all store functions , overriding the previous store schemas.

My Sample Script Looks like this :--

=============================================================

masterInput = load 'hbase://xyz' using org.apache.pig.backend.hadoop.hbase.HBaseStorage(
'f:a,f:b,f:c,f:d')
as (a,b,c,d);

input2 = foreach masterInput
generate
a,b;

input3 = foreach masterInput
generate
c,d;

store input2 into '/dir/ab'
using org.apache.pig.piggybank.storage.CSVExcelStorage('\t','YES_MULTILINE', 'UNIX', 'WRITE_OUTPUT_HEADER');

store input3 into '/dir/cd'
using org.apache.pig.piggybank.storage.CSVExcelStorage('\t','YES_MULTILINE', 'UNIX', 'WRITE_OUTPUT_HEADER');

=============================================================
Where a,b,c,d are my headers in my source file

Expected Output :

Actual Output :