Yes, it is OK to follow their instructions.
PROFESSOR OF IMMIGRATION LAW for over 10 years -- This blog posting is offered for informational purposes only. It does not constitute an attorney-client relationship. Also, keep in mind that this is an INTERNET BLOG. You should not rely on anything you read here to make decisions which impact on your life. Meet with an attorney, via Skype, or in person, to obtain competent personal and professional guidance.
The adjustment of status interview notice is a general notice issued to all applicants. As such, not everything is applicable to you. You need to follow the instructions that meet your unique circumstance.