From R80.10 all custom reports and schedules are personal, why nobody knows yet, but this will be resolved in a later version.
The best way to resolve this is to use a special reporting user, as you then only have 1 set of reports and schedules. That way all can also see what reports have been schduled and not every admin runs the same reports every week.
In a multi domain environment this is even worse, customers asking admin 1 for a report, he is not handling the next request from same customer but admin 2 does not see the previous created scheduled report and starts over again, result customer receives 2 reports, the first that was " faulty" and the right one.
Regards, Maarten