Upfront broken on homepage

We're using your excellent Upfront theme extension on a client's site, and when I try to edit the homepage layout using Upfront, the Upfront sidebar doesn't load and the rest of the interface seems distorted (see attached Trienawear homepage.png). Upfront seems to load properly on the inside pages, but not the homepage. There's also been an issue with certain elements changing size and/ or color when invoking Upfront on the homepage (see attached before & after-upfront-runs.png). Any assistance you can offer would be greatly appreciated.