html – Problem showing posts on the home page

I have a blog on the bloggers platform ( … the problem is that on my home page there are 8 posts, while I had to show 10, so I have configured it. put in the last post 8) "Input Jump" in different points of the post but I did not see the result. I have done it in the past many times and I have worked but not this time.
I tried to put it in 9 publications, but nothing else knows someone who tells me what the problem is.