Thanks Harsh,
This is a great answer and defenetely agree with you.
These reports are for a " franchise" type of business. It is the same Data Base that is shared accross all companies. The size / operation is quite different and also they have been around for a while. That create some limitation on developing tailor made Chart of Accounts.
I also need to be able to compare performance between companies and branches, so I need same Chart of account.
I have created a different report where I am not able play that much with presentation, but do the job.
I know now the limitation of the good looking reports 
I will use you comments for future reference!
Thanks a lot for your help!
Cheers,
Ezequiel