Linked in-Sign in Problem

Why do I need to click Sign in button twice to be into Linked in?

I was expecting this to be corrected long back but seem that Linked in people didn't observe this problem or is it something I have misunderstood the flow?

Once I come on the homepage, I am asked either to join or sign in as shown red in below image. 

As I have saved the email and password, once clicked the Sign in link, it needs to navigate me to my page, but instead it shows another page to sign in as shown.