There are a few FSX A-380 panels in various libraries. Depending on where you downloaded your A-380 from, you'll probably find that it doesn't actually include the 747 panel itself, but is aliased to the one already present in your sim. The same applies to the soundset. Go and have a look... you'll find the sounds are aliased to your default 737.
To alias panel and sounds to ones already existing in the Sim has been practiced for many years. It drastically reduces the total file-size of the download.
If you compare the file-sizes of a soundset, a panel and the aircraft itself, you'll see that in most cases the aircraft is much smaller than the panel or the soundset.