Overriding $:/palette during static export

[James Anderson]

I'm updating some of my TW static export plugins, and can't quite figure this one out. 

My export structure looks like this:

.\mywiki.html                    <- $:/palette is used $:/theme is ignored

.\export.bat

.\tw\tiddlywiki.info

.\tw\tiddlers\theme.tid      <- this $:/theme used

.\tw\tiddlers\palette.tid     <- this $:/palette ignored

When exporting using a batchfile/TW NodeJS it seems that I can override the theme using something like the above, but not the palette? Is this by design? or am i doing something wrong?

Thanks,

James