> Which is confusing, as it works just fine with xsl:sort being a child of
> xsl:for-each UNTIL I add in a value-of statement.

xsl:sorts have to be first so you need to put all the value-ofs after all
the sorts. once you have xsl:value-of a later xsl:sort is an error
(although the wording of the error message you show is less than ideal,
which processor is that?)

David