Editing “Single product layout Mega electronics”

It’s seems I can’t resolve the editing part about ”Specification” part.

By default ‘pa_colors’ work, but I also created a ‘Test’ attribute and put it on one product for testing phase.

As you can see, the attribute is there and it’s working from this point, but when I want to edit the ‘single product layout’, and want to put that specific attribute to the ‘Specifications’ part. The only attribute that is kinda working is color, and if I put the ‘test’ attribute, that part of specifications just wanished. Probably is the problem that I don’t know how to do it right, so I will provide as much images as possible.

From the bellow image, that color part is working no problem

Now when I put the ‘test’ attribute, the section with tittle ‘Processor (Test)’ will just vanish, like in the way that I didn’t do something good.

I tried everything and just can’t figure out, probably I am not doing something right, so can you please explain this part to me, if I’m wrong, just how to fix it, because in the future that part is so important to me, because I will have so many attributes, that I will also want to implement it that ‘Specifications’ section.

Thanks.

P.S. I will also upload these 5 images, in case they won’t open.