I was getting errors during the check out and I found that if I disabled shipping the errors went away. By suggestion, I uninstalled the e-commerce add-on and reinstalled it in hopes of fixing this. Now when I reinstall the e-commerce add on I get the following error:

mysql error: [1062: Duplicate entry 'billing_first_name-2' for key 2] in EXECUTE("insert into AttributeKeys (akHandle, akName, akIsSearchable, akIsSearchableIndexed, akIsAutoCreated, akIsEditable, atID, akCategoryID, pkgID) values ('billing_first_name', 'First Name', 1, 0, 0, 1, '1', '2', 0)")

Any Help would be appreciated!