This guide is to change or fix the number of posts on the main or homepage.
By default, Blogger show number of posts on the main/homepage page is 7 (seven) or 6 (six)
The preferences for everyone are different so, there will be people who like to display more and vice versa.
FIRST, Login to your blog dashboard and click on the layout option
SECOND, Under the main/page body, click on the edit (pen or pencil logo) option which will either be on the upper or lower part of the right side
LASTLY, You will have a popup page, in the top part change the number of posts to your preference. when your done scroll down to the bottom and click on the Save button