This is how most, if not all, would expect it to work:
1) enter listing info, address, zip…
2) update page (save)
3) now the lat/long are set for the Google map
4) now maybe your “map picker” can help people with not so accurate lat/long values and change the zoom level
With the Eastend theme, I fixed the backwards lat/long text input fields and also set a default lat/long, and default zoom level. I fixed these by editing your theme files.
No theme is perfect, but backwards lat/long values, is just wrong.
You should have a “default location” that is able to be set. So when you add a new PROPERTY, it isn’t a blank map pointing to the middle of the dead sea like it is now.