Recurring Task Creation

I know there was a bug that was fixed in an earlier update, but I still have issues with recurring tasks. 1. When I attempt to set the recurring schedule, “save” button grays out, so no indication if the sched is saved. 2. Doesn’t work, following day no task created about 40% of the time. 3. This may be not a bug and just functionality, but how does one create a recurring task with subtasks that are nested in that task, not their own entry on the scheduled day?