Exported XLIFF file including content from other course

Hi there,

I am getting a colleague to translate some content from me using an XLIFF editor.

However, when I upload the XLIFF file for Course A (which is the one to be translated), the editor shows content from Course B which is not meant to be translated at all. 

Is there any reason why this might be happening and how can I avoid having all this extra, unnecessary content in the file?

Thanks,

Ian