SYMPTOM:
In Strategy 9.x, users may notice that time-based schedules that are supposed to run weekly on only certain days of the week are running every day of the week. For example, a schedule might be configured to run weekly on Mondays at 4 AM as seen below:

However, users notice that the schedule is triggering every day of the week at 4 AM instead of only on Monday. This causes the subscriptions that are tied to the schedule to be sent to out every day of the week, instead of just the specified day.
CAUSE:
The issue occurs because the definition of the schedule object in the metadata is in an inconsistent state.
ACTION:
Open the Schedule Wizard for the schedule in question, click "Next" in each window without making any modifications to the schedule, and click "Finish" in the "Summary" window. After doing this, the schedule should only trigger on the day specified in the Schedule Wizard as desired.