Always scroll to top!!!

Hello!
I use div id’s and in the menu i have : http://mywebsite.fr/#idDiv as an example. But whether i click on the first link or second, it always scroll to top.

My website : http://www.agence-logo.fr/agencelogo

How can I do? I don’t understand!

Thx

https://ww.wp.xz.cn/plugins/page-scroll-to-id/