Hi,
1. Currently it can be edited via the front-end form only, Google Maps script is not loaded on the back-end. This will be fixed in the next version (I’ll update it next week). If you add listings manually and you’re the listing owner you can consider editing it via front-end before the next version is released.
2. Categorized attributes (select, radio, checkbox etc. fields) are managed on the listing page, if you edit any listing there’s a “Pets” box in the right sidebar, where you can add new options or select options for the current listings.
PS. Feel free to post any suggestions for improvements, I’m working on this plugin full-time and release a new extension every week, so any feedback is appreciated. Thanks!