Duplicated Paragraph Formats in Table of Contents

I'm using FrameMaker 2019 and I'm encountering a strange issue. When I generate the TOC for my book, all entries in the TOC are duplicated, meaning the elements are listed properly and then they are all listed again. The first set of entries includes right tab top and leaders, then immediately following this, everything is listed again, this time without the leaders or tab stop.

The only thing that I can think of that might be related is that I recently started getting unavailable font errors every time I update the book. TO remedy this, I had to replace courier with courier new in my template. I don't see how the two could be related, but its also a recent problem.

I'll continue to troubleshoot it, but if anyone can think of a reason as to why this might be happening, I'd appreciate it.