Oddities keep being uncovered in how the formatting options are translated into HTML. I keep thinking I've fixed all of them, but that is apparently not the case. If you encounter any such problems, PM me w/the options you applied, in what order they were applied, and a description of what kind of funky output was produced, and I'll take a look. Theoretically you should be able to stack as many formatting options on as you like, but in practice sometimes this causes issues.