How do you export the image from Lightroom, because exporting the image from Lightroom still keeps the image in Lightroom.
Could you please tell me your workflow step by step.
Simply File then Export......
Are you exporting the image as JPEG , and once exported the image, do you change the location or delete the original image as well
Yes exporting as a JPEG. Not changing the location or deleting the original image
Should I take it that this is a major fault?
If things are happening as you describe, then yes it would be a major fault. However, most of us are not yet at that conclusion.
Mac or Windows? What version?
What exact version of Lightroom? (see the about dialog for the WHOLE version number)
Can you attach a screen shot (or two) of the wholly expanded export dialog to this web thread so that we can see exactly what your settings are?