# Why The Two Lists Don't Add Up

> Identified counts people, Anonymous counts browsers. Adding them together is meaningless.

Source: https://behavly.io/help-center/user-activity/lists-dont-add-up · Behavly Help Center · User Activity

This is the single most common misreading of User Activity, so it gets its own page.

|  | Identified Users | Anonymous |
| --- | --- | --- |
| A row is | One **person** | One **browser profile** |
| Same human, two devices | One row | Two rows |
| Has contact info | Yes | Never |
| Answers | Who is using the product | How much traffic is unidentified |

Because the two lists count different units, `identified + anonymous` is not your total audience and the ratio between them is not an identification rate. Compare each list against itself over time instead.

#### Windows, Not Totals

Both lists read a window of recent data rather than your whole history. Each source returns up to **200 identities** per request, and the per-person facets — pages, sessions, device, country — are computed from that source's most recent **5,000 events** in the selected range.

Over a long range on a busy site, older rows will have no event data attached. Those rows cannot be classified by engagement, pages, device or country. Shorter ranges are complete.

> Note: If a list looks oddly sparse, narrow the date range before assuming data is missing. A 7-day window on a busy site is complete where a 90-day window is a sample.

See also: https://behavly.io/help-center/user-activity/filters, https://behavly.io/help-center/troubleshooting/numbers-look-wrong