@petrescatraian The number of posts displayed in a channel also depends on some server side settings.

There is a total number of posts that are processed to determine if they match your channel setup and therefore are stored in the channel. Local setting: 30000 posts.

There is also a maximum age of posts. If posts are older they aren't displayed. Local setting: 72 hours.

And there are 4 or 5 settings more. 🙂

All of these settings have an impact on the amount of data stored in the database and the performance of the channel.