QQQ has been real for years. It is a registered ticker symbol for the QQQ Trust, a basket of Nasdaq stocks. There is also a NASDAQ tracking stock named QQQQ. It is interesting but the name QQQ Trust, is by no means a unique event today, or even recently.
I didn't see Sep 19 anywhere, where did you see it?
I see what you were seeing, that was a display of commodity futures prices, 'Orange Juice' Price for Delivery was Sep/19, Aug/19 etc.
Correct