This may sound stupid, but I forgot.

I am trying to upgrade my IOS but don't have room to load the file. I have 2 bin files from the last upgrade I did and I want to delete the one I am not using. So I did the delete flash:c2600 XXXXX.bin, and it is marked deleted when I do a sh flash, but I still can load my new file. What am I missing.

Sorry for the dumb question.