This is hard to diagnose from your brief description. The software for your email package is obviously a key component here. Are you pasting the Word content into a Browser version of gmail - what browser? Have you tried other browsers? Or are you pasting in to an email package that is not browser-based or not Google's gmail site?

I would expect that there is local formatting in the Word document which is causing the shift. If you can select the Word content and press Ctrl-Space and Ctrl-Q to remove all local formatting - does the Word document still look the same? If you then copy that and paste it into your email does the same issue still appear?

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Andrew Lockton
Chrysalis Design, Melbourne Australia