Level 3 headings in TOC appear as books with level 2 pages underneath

I'm importing a Frame 9 document into RH8. I've mapped my styles in the Conversion Settings, and in FM I set up the TOC styles so that heading3 was indented more than and smaller font than Heading2. But when the TOC is generated in RH, I get something like this:

HEADING 1

   Heading 2a

   heading 3a

   heading 3b

   heading 3c

      Heading 2b

      Heading 2c

I've attached screen shots.