Thanks for posting your questions here, @mforest.
I'd be glad to provide some info with your deposit not showing on the reconciliation window.
First, your transactions that have already been reconciled are excluded and won't show on your reconciliation page.
With this, may I ask if you can share a screenshot of your register? Any information will surely be able to help share specific resolutions and will let us solve your reconciliation.
In the meantime, you can review your deposit in your register if it has been marked as R or Reconciled. If so, you can consider it as the reason why it's not showing on your reconciliation.
I look forward to chatting with you soon. Have a safe and productive rest of your day!