Thank you so much @Alisa_Hall,
So from what I can see, the new Numerical Custom Field sum feature is available on your account, so it seems that sums you’re missing belong to Everhour. My guess is that Everhour is working on their update following the roll out of Introducing our new Spreadsheet-Inspired List View!. If you’ve seen this option popping up earlier on this week, it is possible that Everhour was testing this feature, but to learn more, I would reach out directly to tehir support team following instructions in this article: Everhour + Asana Integration: Time Tracking for Teams • Asana.
Since Everhour is a third party application, it’s unfortunately not something we can troubleshoot on our end.
Hope this helps Alisa 