[Tutor] Why is this only catching one occurance?

[Chris Hengge]

Here is my code:
for unWantedItem in directoryList:
            try:
                if "hex" in unWantedItem.lower():
                    if not "bmc" in unWantedItem.lower():
                       print unWantedItem + " removed!"
                       directoryList.remove(unWantedItem)

This only seems to loop through once, and removes 1 of 2 occurances from
this list that should be captured. Should "for" keep the list going through
each instance?

Thanks alot.
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