# 1 - I agree with what has been said.  If north bids 2S over the 2 club replay, it is a reverse.  The reversing hand promises at least 1 more bid (other than pass or if partner doubles interference).

 

# 2 - This is not a reverse.  North is in passout seat and doesn't want to sell out for 2 diamonds.  It promises a distributional hand with cards in the black suits, no desire to defend 2 diamonds and not much in hearts.  A reopening double is preferable to bidding 2 spades when having a tolerance for the unbid suits or hoping that partner can pass the reopening double.  Reopen with a double when it's the right bid, don't let the opponents push you around and get away with bad bids.