A:AnswerImage listing mistake. It is an open-cut out, no pen cover on the rear. The pen slot along the binding line of the case is magnetic, yes. You did not miss anything; hopefully they will fix it soon.
A:AnswerThis is strictly a case. It has no other function than to nicely cover and store your S7+. Now, the S7+ tablet itself CAN download and use various drawing apps via the stylus.
A:AnswerI am not sure that I fully understand this question. There are two items that make up the keyboard and cover. By just attaching the keyboard to the Galaxy Tab S7+ both the tablet and the keyboard will lay flat. However if you prefer that the tablet be viewed upright then you must attach the cover to the tablet. Both the keyboard and the cover attach to the tablet easily via magnets. They also detach easily from the tablet. Hope that this answers your inquiry.