Illustrator 9.02
OS9.1

1) I used 4 color in illustrator and saved as .ai.
Whenever I open this file, the color shows up 4 color with fractions.
M30Y100 >>> C2.35, M29.02, Y96.86, K0.86.

2) With the same file mentioned in the above, even though I save the file "Cocument Color Mode" as CMYK,
whenever I reopen it, its shows up as RGB.

How can I prevent these happen?