There's the rub - you should stop claiming things as supernatural and trying to identify them for what they are!then how do you determine what is the absolute limits of what is possible in nature?
To claim something that occurs as supernatural is absurd - as you have observed it - and thus must be within the laws of nature (albeit laws that we don't fully understand). So rather than saying "it is supernatural" you should go out and investigate it - and do some science!
However, to claim something for which we have no evidence as supernatural means that you are saying it IS beyond the laws of nature. Everytime we push back our understanding of the laws of nature - this thing (for which we have no evidence) is BEYOND those.
But nothing can "currently be supernatural - but tomorrow it might not be, depending on our understanding". That is ridiculous and a gross misuse of the word.