Answer
STAFF
Sam Wierema
18-May-2011 15:24:42
It usually takes some time for us to get all your statistics. And even then sometimes non-native retweets get counted under the @mentions section (point in case see the @mentions for the 12th of May).
I've just tested and it seems that re-tweets do you show up in your report at this time. Might just have a case of waiting for stats to be retrieved.