Everything looks okay to me, except for the result limits. I guess you had a much older version installed, whereas the result limit option was changed in one of pervious updates. Now it is possible to set the limit per content type. I've changed the post type limit to 1, as you only need 1 result at the time. ( you can change that on the General Options -> Limits panel).
I could not find any page related issues though. I've tried some postal codes randomly, like 7797 or 7798 or 1461 but returned the correct and expected result as far as I can see.
Do you know a specific search phrase or a page which is not working as it should? If you know an example or more examples of search phrase/expected results, let me know.Best,
If you like my products, don't forget to rate them on codecanyon :)