Pagination: Previous link on the second page shall not display page number in link

[eluser]indapublic[/eluser]
Hello, everyone. I have a trouble with Codeigniter Pagination and can not resolve it. My config (only part):

Code:

'use_page_numbers' => TRUE,
'first_link' => FALSE,
'first_tag_open' => FALSE,
'first_tag_close' => FALSE,
'last_link' => FALSE,
'last_tag_open' => FALSE,
'last_tag_close' => FALSE,
'next_link' => 'next',
'next_tag_open' => '<li>',
'next_tag_close' => '</li>',
'prev_link' => 'previous',
'prev_tag_open' => '<li>',
'prev_tag_close' => '</li>',
'cur_tag_open' => '<li class="active">',
'cur_tag_close' => '</li>',
'num_tag_open' => '<li>',
'num_tag_close' => '</li>'

When I on the third page (list/3, for example), my previous link is list/2 (is correct). When I on the second page (list/2), my first link is list (is correct), but previous link is list/1

How I can change it behaviour? I can not find anything about it in manual