Are you remembering to click the Submit button to save changes when you follow the instructions we've provided to you previously? Nobody else has reported that their settings fail to get saved after they click the Submit button, and we see no reason in our system why that could even happen to you or anyone. The way our service works, there's really no way that something on our end could work for everybody except one person, since everyone uses the exact same functions in common; either it works for everybody or it works for nobody.
We cannot change any settings for you without your password. If you email us your E-junkie login password (do not post it here!), along with an explanation of exactly what you want to charge for shipping, then we can log into your account "as you" to change your settings and verify that those settings get saved properly.