Hi Satish,
You problem is in your browser. The browser will execute the click event on the activate keyboard command (in 98% of all cases, press enter on a link will do that, but there are a few exceptions) Also there are some differences between browsers in this area too.
So, yes, the problem is in having both on your element. You have to handle that case manually. Simplest way is to debounce your function a bit.
Regards
Sander