Begin Date is defaulting to 1 day after Created Date

[MrAnalogy]

RERPO STEPS

Due Date
1. Add Task
2. Set Due Date for 3 months from now.
3. No Begin Date is set (and none visible in the Item Attributes).
4. Add Reminder (15 minutes). Sets it for TODAY. And sets Begin Date to 1 day from now (whether I set Due Date for 3 weeks or 3 MONTHS from now)

5. Delete Begin Date and repeat #4 and it sets Begin Date back to tomorrow.


I looked in my Task template and Begin Date is not visible.