Tamiya painting instructions

Hi folks!

I have a question about Tamiya painting instructions. I was building the Tamiya Porsche 911 GT3 and the instructions indicated for one part, X-11:1+X-26:1. I assumed that meant one coat of chrome silver covered by one coat of clear orange because I couldn't imagine why I'd want to mix them. I painted it as separate coats and it looked "right" compared with the pictures on the Tamiya website. On other Tamiya models, when I've encountered instructions like these, I've painted separate coats.

Now I'm building the Tamiya 360 Modena and the beige interior instructions indicate X-6:1 + X-15:10. That can't possibly mean one coat of orange covered by 10 coats of flat flesh, can it? Are these mixing instructions indicating one part X-6 plus ten parts X-15?

Thanks for the guidance!

KB