The issue isn't one of complexity but of what's in the source document -vs- what's in the target document. All of the variable content needs to be in the source document (i.e. the one referenced by the INCLUDETEXT field(s). It appears that, in the target document, you still have some of the content that's supposed to be variable. The other possibility is that one of your INCLUDETEXT fields can't find its referenced content and therefore isn't updating. Note that, if you bookmark different ranges in the source document, you can use a different INCLUDETEXT field in the target document to reference each one, thus inserting the variable content in different places.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]