1) The Wizard only compares pushing to folding. It does not consider moves that would require post-flop play. You are correct that 30BB is too deep to push, so you should consider a non-all-in move. Around 10BB or less is the area where pushing is generally better that raising.
2) Please send this hand to support@sngwiz.com and I will investigate.
3) Default opponent hand ranges are computed using tables that consider the number of players in the hand, position, previous actions, and stack sizes. If you want more information, download SW1 and see “Custom opponent models” in the help.