I implemented Link Table concept in my application, then gave a reload, after reload, 9 billion bookings is seen, I saved and closed the application, when I open the closed application again, I am getting 7 billion as bookings, In both cases, section access was applied.
Even if you have section access applied but you reload the document then the whole data gets reloaded ignoring the section access. That's the reason we add Publisher Functional ID in the section access table as Admin so that the reload will be full data.
Section Access is applied when you open the document. Remember one thing that Section Access ignores the null entries of the Field used in the section access table.
So can you please make sure that the field name based on which you are reducing data from the document does not have null values.
Can you please post screenshot of your Section Access Table?