Swiper slider's multiple rows as thumbnail not working as expected

I am trying to make a multi row thumbnail slider. I am using swiper slider for this purpose. I have made it but it is not working as correctly as it is supposed to. I will provide the link below so you can cross check the problem with the view.

Here is the link to the code.

In the view as you click the thumbnail it works perfectly as expected as it syncs to the corresponding slider. No problem there.

But when you click the fourth thumbnail (THE WHOLE THUMBNAIL GROUP) slides too which is not good. There are six thumbnails in view. How can you make it so that the thumbnail group only slides after you click sixth thumbnail?

– Sorry for the bad English