Whenever a customer puts items into their cart and logs out their email disappears until they log back in. Is there a way to view the email and info in commerce of the person when they log out?
You mean on the front end? User data is cleared when a person logs out....that would be the expected behaviour surely? And for privacy reasons, the info for that customer should not be available until they log back in (think about e.g. use of a shared computer).
I think I must be misunderstanding the question, but as I understand it, the answer is no, and the behaviour of the data being clear is expected (and correct).
(Note the cart itself is not cleared on log out with Commerce as it is with most other systems. Took me a little while to get used to that but it doesn't really seem to cause issues...it would be quite easy to write plugin that clears the cart on logout if you would prefer that).