Showing all entries from all accounts (even hidden ones) is actually by design. When originally designed, we felt some people would want to hide the account tab, but still have those entries appear in their All Accounts tab since those things clearly still affect your overall financial picture… but the more I consider what you’re saying… if those things are still affecting your financial picture… why would you hide the account… and therefore if hidden, we probably should omit from All Accounts.
For example, maybe you have an account for dream-planning, but don’t want those things showing up in All Accounts ever, since they are just plans.
I’m adding this as a bug to be fixed – thanks for stirring our thoughts on the All Accounts tab