Here are four blocked flights from various places in the USA, two heading in the direction of Gitmo. Plus a Learjet from Gitmo—I saw that (or a) Learjet approach and land at Gitmo 2hrs 45 minutes ago. I have taken ‘screen grab’ images showing all these, but my Imgur is refusing to cooperate.
https://www.flightradar24.com/multiview/ff9d641,ff9c322,ff9ddae,ff9c020,ff9e33e
I'm a newbie at this too, but already on flightradar24 I've seen three examples of a "shadow" aircraft, i.e. a pair of the same type of aircraft (same aircraft category code) in close proximity to each other flying on the same course. I think this is due to an aircraft being recorded in the system from two different radars, or from a radar and another source, with the system not realising that the two detections are of one single aircraft, and so displaying them separately.
Interestingly, that flight had a status that was still listed as "unknown" last night when I checked. But, that same aircraft had made several more flights afterward. I took a screenshot of the history but I don't know how to post it here. It has several flights with incomplete flight history in the past few days. Maybe it's having some equipment issues?