Duplicate nested mcs not inheriting

hey…
my title may have been a bit confusing so ill try to explain what it is im looking for…
ok i have one mc lets call this mc1 with 3 or 4 mcs nested inside of it
now i have copied and pasted this mc and called it mc2
now if i change something in any of the mcs inside mc 1 mc2 autmatically gets the same changes and vice versa, any way to avoid this?
so i can have the mc1 containg something different than mc2

Thanks

//VoS