Yes I can include some additional information. I wanted to mention that using this table and registration.php script on another hosting site I cannot duplicate this problem; last modified date is correct.
This is the field in question from the USERS table.
`last_modified` TIMESTAMP NOT NULL DEFAULT '0000-00-00 00:00:00'
It is a timestamp field so it is not directly updated by a script. The only date that is inserted by the script is reg_date and that date is correct. last_modified is not inserted based on the script.
This is the insert statement used by registration.php
$now=date('YmdHis');
"INSERT INTO users (name_first,name_last,company_name,address,address2,city,state,zip,phone_number,email_address,user_name,password,reg_type,reg_date) VALUES ('"
.$first ."','"
.$last ."','"
.$company ."','"
.$addr1 ."','"
.$addr2 ."','"
.$city ."','"
.$state ."','"
.$zip ."','"
.$phone ."','"
.$email ."','"
.$uname ."','"
.$pass1 ."','"
.$type ."','"
.$now ."')";