Bullet format styles don't retain ruler settings

Using Omnigraffle 6.6.1. (Been a user since version 4!)

The default bullet formatting is never quite what I want. I can set one bit of text to what I need, but there’s no way to apply it another bit of text. Even if I save a style – and include the ruler settings – Omnigraffle doesn’t really retain the ruler settings (tab stops, etc.). Is this a bug? Or am I missing something?