the different cohorts have some users in common

Hey Flor!

Amplitude is an event-based analytics platform. For each event, user and event properties are sent in. For this user property of “# of dreams created”, I see that one user can have events with different values. 

If you use User Composition chart, and query for “# of dreams created”, and select “cross-property values”, you will see a breakdown of users with more than one value for this property:

https://analytics.amplitude.com/Dreamfora0205/notebook/7ed7pdp/breadcrumbs/chart/new/2immn7j 

If you click into a user with two values e.g. 0 and 1, let’s take this user for example: https://analytics.amplitude.com/Dreamfora0205/project/303550/search/amplitude_id%3D227034653565

If you look at the event “Sleep App”, user property “# of dreams created” = 1

However, if you look at the event “Click Setting”, user property “# of dreams created” = 0

Both of these events took place on 21 July.

This means that when you create a cohort or a chart that looks for users grouped by user property “# of dreams created” in the last 30 days for example, this user will appear in both the “0” and “1” buckets.