Many of the companies that make kits do not number their floss. It usually comes loosely tied together and there should be a list of the colors/symbols included in the kit. So then you have to sit down with this list and sort out the floss to be used. For instance, the list will say: White, 2 yards. Then you have to look thru the floss to find the white, separate it out and either use floss bags or bobbins to wind it on - label it and move on to the next color. It can get a little tricky when there are several shades of the same color. For instance, I recently received a kit that had very light blue, pale blue, light blue, blue, medium blue and dark blue. When this happens, you have to look at the yardage indicated. There were 2 yds of of some, 3 of others and 4 of others, so it was fairly easy to figure out. If you have two yards each of two very similar colors, take a look at the colored picture that comes with the kit and see if you can determine which is which. It's also difficult to know how the company is going to describe the colors, for instance "coral" and "dark pink". Sometimes you just have to guess!
Good luck and enjoy.