EXS 24 Logic Sampler Users Group

Very New to exs and logic, and I am frustrated at the documentation 
which seems to tell more "what" than "how to". I'm running exs24 MKII 
on logic 5.5, Mac powerbook OSX with 1Ghz processor and 1GB RAM.  

The main point which I need clarifying on: when I try to import a 
sample into a new sampler instrument, is it possible (for instance 
with the samples that came with the exs) to make a sample sound at 
every pitch on the keyboard?  When I have tried to import a sound 
(clean guitar) the sample slows down as you lower the pitch, and 
speeds up as you play higher on the keyboard.  Is this the exs's way 
of approximating the pitch via sample speed?  Do I need to purchase a 
sample that has every note of the keyboard sampled seperately or can 
I make the exs24 force a single sampled note to play at each pitch?
(I noticed that the "clean guitar" that came with the exs24 has many 
seperate notes sampled, but not all of them- )

Not sure if I explained that correctly, but I hope someone gets it!

Thanks! Peter