Hi,
The jobs that are not scheduled for today will not be selected to run today. They will not be predecessors.
For example if today were Wednesday then only Wednesday jobs will be selected. On the define screen the schedule may contain jobs that run other days of the week, they will not be selected.
Let me know if I "missed the boat on this"
The second question is more complex. It may be solved using conditional release statements or alerts. There may be better ways also.
2¢