It would help if we knew the make and model of the computer (different manufacturers do things differently) and what restore system you have. I am confused; I havent' seen a multi-disk install in the last fifteen years. Are these multiple DVDs, multiple CDs, or floppies? Seriously, the last time I saw a multiple-disk OS install was on floppies (and I still have them, for some reason).
Where did these disks come from? Did they come with the computer, or did you use some tool to create them? What version of the OS do you have? How do you know it "goes back to 1?" Is there a message "Please insert disk #1," or does it just fail and require you to start over again?
You can do for yourself the first thing that I will do when I get your reply: go to the manufacturer's site and search support.