Hi Jimmie,
What he Apple online store told you is absolutely wrong. Whether this person was ignorant, or wanted you to buy online, who knows.
It's the same thing as when you call support about a know issue you are experiencing, and seeing hundreds or thousands of other people with the same issue on forums at Apple's web site, and Apple says your the first they have heard of it.
Also try asking an in store Apple employee some questions about product, and they have no clue. Go to an Apple store and you will be able to purchase from the store the configuration you want. They are selling three models. Base, Base with 4GB, Ultimate with 1.6 Ghz, 4GB ram, and 128 GB ssd.