Manually editing citations

mtstle

I had to edit a bunch of APA 6th citations to reflect page cited, requested by our instructor. After I'd finished and saved my edited document, just for fun I "refreshed" and noted that my edit's were not undone. Becoming interested, I edited a bibliography entry and "refreshed". It was updated back to agree with the database. What accounts for this behavior and can it be modified if desired.
Regards,
mtcstle