Not sure that's on purpose. The inner DIV is set to 106.08% width. Seems they are 106% funded.

Is there actually any 3rd party ala kickstarter verifying the donations? Or is this number similar to those of political campaigns and their online fundraising self-reporting?

    We are using Stripe to host/power the billing aspects of join.app.net. In the very near
    future I will ask an impartial 3rd party take a look at our data (while preserving all
    privacy of our backers) and publicly verify that the join.app.net was operated in an honest
    manner. 

http://daltoncaldwell.com/we-did-it

I'm saying he probably didn't care that it would break in that case.