.js files loads twice

can anyone answer why all .js files on product page loads twice?

this images shows how .js loads in home page:
Correct Image
and this shows how it loads on product page:
Incorrect Image
I believe if they were loading only once we could save some loading time?

Nice find wxD ! Thank You.

Yes fixing this could speed up the load times.

Can't find the reason why they loads twice just thought that I done something but seems that this persists periodically...

Seems that you made some changes to your product details page and it caused this behavior. it works fine on the demo site, all script files are loaded only once.