Review and Correct Statistics Across the System

### Description

The statistics displayed in different parts of the system, particularly on the landing page and in the admin interface, require review, proofreading, and validation.

Some labels, values, or calculation methods may be unclear, inconsistent, or inaccurate.

### Expected behavior

All displayed statistics should be:

1. Clearly and consistently labeled
2. Calculated using the correct definitions
3. Consistent across the landing page and admin interface
4. Reviewed for wording, formatting, and numerical accuracy

Start by inventorying the statistics shown on the landing page and in the admin interface, then trace their labels, values, and calculation methods. Compare the two interfaces against the intended definitions; done means every statistic is accurately calculated, consistently labeled and formatted, and validated in both locations.

Written by the indexing model from the issue text.