PDF merge and Table of Contents

When I merge a number of PDFs the file names come through in Table of Contents (TOC) in Preview app. However, the TOC in Preview app do not line up with the first page of each file (usually it’s the second page). In other words when I click the TOC in Preview I am getting the second page of each merged PDF rather than the first page of each PDF. Is there a simple fix?

Which page format and orientation (landscape/portrait) do the documents use?

I was able to reproduce this, the next maintenance release will improve this.

Thanks very much. I really love DTPO