Icons and Apps mixed-up in the taskbar!

Hi,

I'm not sure this is the correct section to post this, as my issue is not exactly about customization: it is more about appearance.

Here is my issue: say I just started Windows 10 and no app is opened yet. Now I open an app by clicking on its icon in the taskbar, as I've previously pinned it to the taskbar for a quick and convenient access. The app launches, that's fine. Now if I launch 2 or 3 other apps the same way, my taskbar is now filled with:

_ icons of apps I've pinned into it
_ apps that are actually opened

All of this is normal, except that these 2 categories are mixed up together in the taskbar instead of being clearly separated. Instead of having the icons of pinned apps clearly and neatly positionned on the left of the taskbar, and then, on the right, the opened aps themselves, I have all these mixed up together. This is annoying and it didn't happened in previous versions of Windows.

How can I fix that?

Thanks a lot in advance for your help,

Thank you @dalchina, I had a look at "Enable or Disable Grouping of Taskbar Buttons in Windows" tutorial and it makes more sense now.
Finally I realized what I was looking for was the Quick Launch toolbar: this turorial has been really helpful: Add or Remove Quick Launch toolbar in Windows 10

Everything looks like intended now.

Thank you !