4 Level drill down on a filled map

Dear All,

We have 4 level drilled down on filled map. The 4 entities are as below:

Area ==> State

Church ==> City

Pioneer ==> Zip code

Fellowship ==> Zip code

Each of these entity is having following fields

Address (along with street and number)

City

State

Zip code

At the first level "Areas" are maked nicely as State

At second level "Churches" are maked as City

At third level "Pioneers" are marked as Zip code

At fouth level "Fellowships" are not getting marked (though the data captured are zip codes)

Please let me know why the fouth level is not getting marked (for reference plaease see the imagaes below)

I trust the problem description is clear and understandable :-)

Thanks,

Prasanna V.