So I did a search as follows today (7/4 @ 7:20 PM ET)
And one of the flights it found was a connecting flight like so:
The ASQ5312 flight left ATL and diverted back to ATL. The DAL673 also showed up by itself.
My guess is that for some reason the flight finder found a valid path of KATL -> KATL -> SEQU and gave that to me as an option… even though I don’t really think that’s what was supposed to happen.