NetBackup client-side deduplication and Multiple policies

NetBackup client-side deduplication and multiple policies 

I found this article 

http://www.symantec.com/business/support/index?pag...

And especially 

A NetBackup client using change journal support must belong to only one policy. To use one policy avoids the confusion that multiple backup settings causes. Multiple backup settings can cause conflicted update sequence number (USN) information in the permanent record “ 

 We wanted to setup two policies to backup a Netbackup client with multiple volume. Put all the smaller volumes in one policies and the larger one in one policies as the larger one taking forever to  backup … is this possible ??