continue reading

It doesn’t go to the end. It goes to the location in the post where the <!--more--> quicktag was inserted because WordPress inserts a fragment or id reference at that portion of the post. You’ll find the following in your single post’s source:

<a id="more-31"></a>

If you want to change this behavior you’ll have to edit the WordPress source:

http://wordpress.org/support/topic/68847#post-362948