Hi Eric, thank you very much for your reply.

I have switched the plugin the urchin.gs mode, to see if that delivers more accurate results in Google Analytics. I was under the impression from the text in the plugin that this is something that was to be fixed by google in 2008. I guess that never happened.

So I follow that if the user has javascript switched off, then the sale will not record in Google Analytics. I wonder how common this is?

My main concern, which remains unanswered, is this sale of $55 recorded in conversion reports in Google Adwords that never happened. Or alternatively it picked up the other sale that Google Analytics missed, but got the order value wrong. Could this be an issue in the plugin code? Could this be explained by a default conversion value?

Thanks again and I look forward to your reply.