The default setting on your blog site is apparently 25. For
blogger.com you need to locate and modify the parameter "max-results".
In your case, you can either change the value on your blog site or temporarily override it in Zinepal by adding the parameter "max-results=50" (example for 50 posts) to your URL as follows:
You can try this on your own blog site substituting whatever value you need for "max-results".
There are also other parameters which will allow you to select a range of posts by date, etc. You will find those details somewhere in the
blogger.com documentation.
Please note that future releases of your blogging platform may require a different solution.
Regards, Paul.