Then I guess there's something wrong with what I'm doing?

This is exactly what I do:

1.) Tap "Where To?"
2.) Tap "Address"
3.) Change the State to "Ncr"
4.) Change City to "Pasig City"
5.) Type "23" in house number.
6.) Type "ADB Ave." in street.
7.) 3790T will show "ADB Ave." in the map with the "Go!" button. Do you see the same view wherein the device just shows ADB Ave. in the map (after searching) without the number "23"?