OS 9 showing OS 8 desktop folder

I've installed OS X 10.4 Tiger, OS 8.6 and OS 9.2 on three different partitions on a G3 iMac. All clean installs from CD. If I place an alias on the desktop while in OS 8, it shows when I boot into OS 9. The same with OS 9 aliases showing in OS 8. From Tiger I can see that the aliases are in the correct Desktop Folders on the OS 8 and 9 partitions. Can anyone explain what I'm seeing, and is there a way to disable it so OS 8 and OS 9 function independently?