Deluge displays the uploaded amount incorrectly, but displays the correct share ratio.
I know because by using the Extra stats plug-in, i could see the correct uploaded amount.
Heres an example:
Downloaded: 292.3 MB (303.3 MB) (<< Value in brackets is the Extra stats plug-in's calculation of the value)
Uploaded: 624.7MB (311.1MB)
S. Ratio: 1.075
I hope that was clear enough to understand.