Double scenery layers

Can someone help with this? I installed Calclassics Miami scenery and it installed over the existing scenery, but it is layered over it. The new scenery is there with it's terminal, runways etc, but the old scenery runways are there. Also, the AFCAD in use is the old one.
I tried so many different things, I just can't get it! I tried to search for and remove all the previous Miami stuff I could find, but it is still there!

Anyone got this one? an answer?

use the afcad that came with the new scenery--make sure the old/original afcad file is not in the sim