Que no te has leído el siguiente párrafo, eso es lo que pasa
If space remains after the first week of registration (Monday, September 14, through Saturday, September 19), then registration will re-open for all qualifiers from Monday, September 21, at 10:00 a.m. ET through Wednesday, September 23, at 5:00 p.m. ET. As during the first week of registration, entry during this period (Sept. 21-23) will not be first-come, first-served and the fastest qualifiers in their gender and age group among these submissions will be given entry as space allows. If space remains after this initial period, then on Monday, September 28, registration will re-open to anyone who meets the qualifying standards. Registration will remain open on a first-come, first-served basis until the maximum field size is reached.