AND ANOTHER "I DONT KNOW" TYPE PROBLEM

So I've installed the SDCard mod, I'm back to good old faithful DD-WRT and i've got a mount --bind setup for sub /jffs with /mmc/jffs

but when issuing a df command (Disk Usage) I get the following

~ # df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/root 2880 2880 0 100% /
/dev/mmc/disc0/part1 983771 62686 871095 7% /mmc
/dev/mmc/disc0/part1 983771 62686 871095 7% /opt
/dev/mmc/disc0/part1 983771 62686 871095 7% /opt
/dev/mmc/disc0/part1 983771 62686 871095 7% /jffs
~ #

So there's two /opt mount points.. how the hell is that even possible.. So.. I try to umount them and get the following

~ # umount -f /opt
~ # df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/root 2880 2880 0 100% /
/dev/mmc/disc0/part1 983771 62686 871095 7% /mmc
/dev/mmc/disc0/part1 983771 62686 871095 7% /opt
/dev/mmc/disc0/part1 983771 62686 871095 7% /opt
/dev/mmc/disc0/part1 983771 62686 871095 7% /jffs
~ #

Look at that.. Didn't make a frikkin difference.. Anyone know how to fix this one?