The record list order problem

I have problem with the record list.

I use Record List Template: blog.

I set parameter: blog num leading = 0, blog intro = 0, blog column = 2 and blog num links = 20.

I set the order in section parameter : Last Modified First.

When the first time I access the section through menu, the order is just fine. It shows me the last modified first.

But when I do the following step;

I click a records and then comeback to article list through menu or breadcrumb, the order become random or no longer last modified first.

To make it normal, I have to click home and then go to the section.

Please help me.. thank you