make sure you're removing cod's from the proper java folder. The java folder should be in the folder matching the OS on your device.
make sure the vendor.xml is deleted (it installs with every OS/DM installation so you'll have to delete it every time you install something.
Make sure you're going all the way to the end of application loader. Nothing as far as removed .cod's will show up in the window with all the checkboxes. You have to hit next/finish to almost the end before it will tell you what it's removing.