Hi Samraj,
1. The resource load in planning is not updated when a production order is rescheduled. However the material input and output dates are updated in planning. The planner can use the planning exceptions in case the updated dates for output and input lead to a critical planning situation like stock shortage.
2. In case of a resource breakdown the capacity offering is updated in planning. You get a resource overload exception in case still orders are scheduled during that downtime. Only not released planning proposals can be rescheduled in supply planning. Also not released production orders can be rescheduled in Production Control WoC, however there will be no capacity load update in planning.