Hi Thomas,
This might be pretty late, but the issues I found brought me here. 

Don't use ALL UPPERCASE for the values but rather Name Case if it's a name.

Only the first two parts of the GhanaPostGPS address, without the hyphen, is used for addr:postcode=*. The full address is used in addr:ghanapostgps=*.

Street names should be written in full. Not Ave for Avenue or St for Street.

Happy mapping!