There's no "defective" AFCAD at all and the default scenery doesn't come through.
What you think is default scenery, is instead another AFCAD (not the default one) which contains default buildings, but with different parking positions, and it's probably coming either with another scenery, or with a Traffic package like MyTraffic.
Our AFCAD exclude properly default objects, but only of the original MS default AFCAD for the airport. If you have a different one, you have to remove it.
Use the free ScanAFD program in FS9 to find AFCAD duplicates for PHNL, and remove them.
Of course, the same is valid if you don't have AFCAD duplicates, but the default AFCAD for PHNL has been modified (objects moved, for example).