EXS 24 Logic Sampler Users Group

I recently bought the EXS 24 together with an Emagic 
Sample CD "xtreme analog:vol 1". I read the EXS 24 manual
attentively and i understand it's features and the enormous
power that it generates. 
Still got some questions (many more will follow):
How come whenever i load some Xtreem analog sample and i go
to the instrument editor many times there are "preconfigured"
zones in it, up to 42! I mean shoulded the IE be "clean" with
just 1 zone and 1 group, leaving the user to edit all he/she wants
and needs?
Those preconfigured zones contain audio files that are NOT
the one i selected in the first place. Many of those zone have
files which nr increment 6 per zone (zone 1: bass6, zone 2: bass 12).
Why is that?
I'm anxiously awaiting some spectrasonics cd's but in the meantime
i'll do with that Xtreem analog cd, which btw sounds great.
Are the above mentioned zone situations normal?Or CD rom related?
if so, what's the use of it?