that website is using the daily FINRA numbers which do not represent actual short positions.
it is a known fact that those numbers include all the short term (including intraday)legal shorting that MMs do in order to keep a fluid market as well as long trades that are mis-marked.
i easily dropped in a few well know share printing pump and dump scams like FFGO and they all show the same results, even though there was no actual short position which the bi-monthly report does reflect.