I accidentally duplicated a status as well (@JuliaRosien). I don't know why you're discounting @typerist's tweet, yes she tweeted twice but it doesn't mean both are excluded, it's only counted once.
Just found something more interesting. 'Dan Julius' direct retweet of @tommytrc looks like it was actually done by someone who works for JPEGmini (icvt-tech) based on my google search their email has icvt-tech.com on the end.
And right from their rules: Employees of Sponsor and members of their immediate families are not eligible to participate in the Contests. All federal, state, provincial, and local laws and regulations apply.
Don't count tommytrc, or JustIs that tweeted twice. 13 total.
Edit: Looks like I missed the direct retweet, so 14 total.