The problem is not with your question.
The skeptics.stackexchange.com is not showing unanswered questions with negative answers.
In a blog post Ok, now define answered. It said:
As of today, here’s how we do it:
Answered questions have at least one answer with one upvote (or
Unanswered questions have no answers with upvotes (or ...
herbalism has four questions that need an answer, but aside from that there has to be a bunch of really shady claims regading herbs. For example:
Does tilia have any relaixing effects over placebo?
Is willow bark a viable alternative to aspirine?
Is artichoke an effective hung-over remedy?
and so on.