Why is this happening?
The scrolling is automatic for the static html page by default (this could potentially be a browser issue). There are several fixes to this issue, I will let you decide which is the most appropriate to solve the problem:
How can I solve this?
Just as this problem for the JQuery has not solved itself by default, you can do it dynamically (like everything else we can do with JS/JQ):
1. Include the following in your $document.ready:
$window.scrollTo(0,document.body.scrollHeight);
2. Grab the element you want, and put it into the viewport:
$document.getElementById( 'bottom' ).scrollIntoView();
As said, there are several ways of solving this, and the problem lies in the JQuery vs. static and how it is being served to the browser of choice, these fine tuning parameters are set to default in some browsers and not in others.
PS: Word to the wise, don't post links to your site, just images and code snippets. This may hinder your answers from others in the future.