Hey,
sometimes it might sound a bit stupid to tell you things you think you know, but listen to them, show them the respect they deserve. If you knew what they told you thats OK, at least thats confirmation you are doing it right, and perhaps sometimes they will teach you something you didnt know or though you did, and thats alright too. remember not everyone is created equal they may have experienced less than perfect apprentices before, earn their respect by learning and applying that knowledge. we all start somewhere and all think we know more than we do. after 10 years Im still learning.
Cheers,
Justin P