Me too. I got to the store late (around 6:30 AM), so I wasn't able to reserve my ≡s until roughly 11:07am (at least that's when my email notification from my bank was sent, and it's usually immediate, whenever I used my card). I've been refreshing the MyTesla page every 10 minutes and it's been down for about 10.
... It's back up now, telling me to sign in. But still no reservation number.