I think the options should be included in the receipt email, you can update the receipt email page though to see if this helps. Go to WA_Universal_Email > Templates > receipt.php, back this file up as a copy first. Now update line 35 from this:
<td><strong style="font-size:16px"><?php echo $WA_Store_Cart->DisplayInfo("Name"); ?></strong><br />
To this:
<td><strong style="font-size:16px"><?php echo "".$WA_Store_Cart->DisplayInfo("Name").(((strpos($WA_Store_Cart->DisplayInfo("Description"), "--")) !== false)?strip_tags(substr(nl2br($WA_Store_Cart->DisplayInfo("Description")),strpos($WA_Store_Cart->DisplayInfo("Description"),"--"))):"") .""; ?></strong><br />
This is the same code that was updated to get the options to be stored for the order, give this a try and let us know how it goes for you.