... i'm not sure where the source of this problem might lay -- browser? github? coveralls?

when I open my repo ( https://github.com/ericblade/mws-advanced ) I see a coveralls badge showing 63. My coverage has never been at 63 on it. When I click the badge, and go to the coveralls page, it shows the badge and coverage stats clearly being 88. If I load the badge SVG directly into my browser, I see 88.

Any ideas? I have tried clearing my cache, using different browsers.. it seems that when I source the image from coveralls, via github, it gives the wrong number, and I don't see how that would be.