Flying standby next week. When I check availability for multiple flights it shows 0/0/0, with 1 or 2 standbys listed. However, when I view the seat map. It shows approximately 15 open seats in Economy Plus (blue seats). Are these actually available or just not assigned yet? If I do a day of test run, most flights show the same thing. Are Economy Plus seats not included in totals or what is going on here?