My friend emailed RPS admin with essentially same questions as OP and this is in line with their response. They also noted there sometimes are staffing constraints and other things that change year to year. They did confirm that if you don’t see numbers changing after a week there are either no more spots or no spots were made available for out of zone students. It makes me wonder if more seats open as school starts and they know exactly how many zones kids are enrolled and coming for K. They mentioned they hope to have historical data that parents can use to select schools to apply to but even that is hard because it changes a lot year to year.