It doesn't use bookmarks because the document is not arranged in the traditional way. The subheadings I'm pulling into each TOC are located throughout the entire document under various level 1 headings which are also throughout the entire document. The TOCs are basically being used as lists, where each TOC has it's own subheading style. Those subheading styles may appear anywhere in the document under any of the level 1 headings. Each TOC should only list the specific subheading style associated with it, as well as the level 1 heading it appears under. If the level 1 heading has no subheadings of a specific style under it, then that level 1 heading should not appear in the TOC associated with that style.