eff_i_g,
I am afraid after reading your reply to BrowserUk, I am still left wondering about how the program works. You speak in terms as though we understand what you are talking about. What do you mean by section and how is it determined? This isn't really a question I want you to answer because I am sure it will just lead to more questions.

I am afraid you just aren't providing the technical details necessary to help. I believe the only way that I personally am going to be able to help is if you were to provide a sample of the data (masking sensitive info is fine but it must be representative of the real data), the code that is processing it, and an example of how it is invoked.