Saving changes: Several changes revert to original configuration after leaving upfront

I have attempted to change theme colors to no effect. Now I have this highly pixelated background to dougdaniel.net/blog that, once saved, reverts to original configuration as though I have done nothing.

I would be happy to grant access to my website so you can try it yourself if you'll remind me of how to do that.

I am using upfront with the spirit theme.