Word 2007 Multiple Document TOC/RD

I've got a document that grew rather large and started losing its formatting. Because of that, I split it apart into 2 separate documents. I'm trying to get a single TOC. Using a RD field, I've got the TOC appearing from both documents however the RD entry is showing first. The TOC from the main doc has Chapters 1 through 7 and the RD has 8-11. As it stands now, its showing 8-11 and then 1-7. From what I've read, its supposed to list them according to the page numbers, however in my case, its not doing that. The second doc starts at page 121.

How can I get the TOC to show the main doc's TOC first, followed by the RD entry?

Thanks.
 

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