Headscratchers / Shoebox Zoo

• Does Ross know about all the magic and mysteries? He seems to find out at the end of the first season so when the second began I naturally assumed he was sending her to America by herself because he knew she had to do something. Yet when he shows up in the latter half of the second season he never gives any indication he knows about Toledo, the book, the chosen one or magic in general. Did someone erase his memories or did he just assume Marnie's odd behaviour had absolutely noting to do with wizards and evil books? Or did he somehow manage to rationalize Marnie vanishing into a tunnel behind her locker?