Steps to reproduce the issue

Using pagination on the home page

Expected result

https://satworld.ru/?start=20

Actual result

https://satworld.ru/?start=21
https://satworld.ru/?start=22
https://satworld.ru/?start=23

System information (as much as possible)

Joomla 5.0.2 + Cassiopeia template.

Additional comments

Good day!
Introductions of materials from different categories are displayed on the main page as a news feed - Category blog. Pagination at the bottom of the page. 10 news items are displayed on the main page and on each subsequent pagination page. Everything is displayed using standard Joomla. Logically, pagination pages have an address like ?start=10, ?start=20, ?start=30, ?start=40, etc. However, search engines also find addresses like ?start=21, ?start=22, ?start=23, etc. Why do they find them? There are no such links anywhere on my site! I believe that this is a serious SEO problem. Don't you think such a problem should be fixed?
By the way, inside the categories also the same news feed, also the Category blog. And there are no addresses like ?start=21, ?start=22, ?start=23. All of them are redirected to the page ?start=20. Logically, it should be the same everywhere else on the site. Am I wrong?