When you submit your manuscript or print file for formatting, we work under the assumption that you’ve handed us the final version of your book, and that no additional changes will be needed. When we build your ebook, we extract the text from your original manuscript and build your file from the ground up, using ebook-specific HTML and your submitted document as a guide. If text needs to be changed after this point, it requires us to go into the source code of the ebook, make the adjustment, then close your files back up. We don’t see words on a page, like you do; instead, we see long lines of code that correspond with how your book will look on an ereader. Making unexpected changes takes a bit longer than the initial format, and the changes will incur an additional charge for the extra time and work required of the formatter.