How do you alphabetize your customer list? Mine was all in alphabetical order and then it was all mixed up. The only way I can keep it in alphabetic order is to turn on all customers with the deleted ones in there too.
The customer list should be alphabetized by default. If you have problems, click Customer Center, open the Customers & Jobs tab and select Re-sort List from the View menu. After that, you need to press OK. Check the official web page for further information.