I had to resort to Google translate for the second paragraph.
You said:
Con respecto al segundo tema la pantalla que pegue es de Configuracion --> tareas --> alertas y notificaciones y el problema de eso es que no me llegan las notificaciones cuando la tarea esta retrazada, si me llega el aviso de cuando la creo.
Google Translate:
Regarding the second topic, the screen that you paste is of Configuration -> tasks -> alerts and notifications and the problem of that is that I do not receive notifications when the task is delayed, if I get the notice of when I created it.
If this translated properly then you are saying that you do not get alerts when a ticket is delayed. osticket does not have a concept of "delayed" tickets. So maybe you mean Over Due? As in it passed its SLA?