Amodem from which communications occur in discrete units, and in which the start of a unit is signaled by a start bit at the front, and a stop bit at the back signals the end of the unit.
you can only change it if your real name or personal information was in it. and if so you would need to contact them directly with a username change request.
how it is supposed to work is that provided the footnotes were inserted correctly using the reference tab and then click on insert footnote, then these notes will also be moved with the text. as long as the selection includes the footnote reference in the text, moving the text will also move notes as well.