But I also got one from Aspen for their...

But I also got one from Aspen for their "Products" http://www.aspenpharma.com.au/productsBut if you search or browse the products Fleurstat isn't there.

FWIW, that same thing has been happening for at least 6 months.  The word Fleurstat was likely never on the page to begin with.  Google results do not necessarily have to have your search terms in them.  Google looks at your search terms and makes assumptions about what you really want to find and then returns results based on that.  In this case, Google sees that the rare word "Fleurstat" is often found on pages that have the words "Aspen" and perhaps "product". So naturally the Aspen products page is given a high ranking.

Nothing fishy

If you want to make sure the search returns only results with your actual word, then use a "literal" search by putting it in quotes.

For a better explanation see here : 
https://www.link-assistant.com/news/keyword-refinements.html