Hentai Manga and Doujinshi Page

I've noticed that when I'm on any page other than page 1 and click previous page, it leads me to the first page instead of the previous page. I don't know if it's just me.
Ex: Going to Manga tab > Most Favourite Manga > Go to page 7 > click previous page > Goes to page 1 instead of page 6.

If you read this, please try it yourself and post the result.

It's because if you click 7 right after entering the topic and not actually clicking on page 6 it won't go to 6 it'll send you back to the page you opened on your browser before.

It still goes to Page 1 even if I go on page 6, then page 7, then clicking previous page.