One little clarification about when an elite status is activated. The OnePass computer system upgrades elite statuses on Saturday evening. So, every Saturday, the computer checks to see whose mileage balances warrant an increase to the next level. So, the real answer is that your status would take effect on the first Sunday after your flights are posted to your account. Once that happens, you will have all benefits of the particular level for which you qualified.

Regards,
RChavez