I have experienced lots of similar incidents. More often, there are just people who really think you dont know how to do things. They tend to teach you a thing or two and yet they forget that what they're doing contradicts to what they are teaching. Then again, since it seems you know more than her, its like a moral responsibility to teach her or "guide" her. In most banks though, customer service representatives and other bank staff teach you things that they were not really thought well to them... Can't blame them. They're just doing their job. Just be morally upright and do your part in making the world secured of hacking...

cheers! welcome to AO