A family of Microsoft word processing software products for creating web, email, and print documents.
What you are seeing is the expected behavior in Word. The main reason for using a heading style for appendix titles is to make use of autonumbering (such as headings, chapter-numbered pages and figures). If you don't need autonumbering, you can use a user-defined appendix paragraph style with its paragraph outline level set to 1. The style will show up in the navigation bar aligned with your heading1s. Without any intervention, it will show up in a normal outline-level-based TOC. I don't have Adobe PDF MAker and must leave it to you to test whether the pdf bookmarks will be as you want them.
Pam
Pam