It would make sense since there's an open day after the Omaha show. And since it's the smallest venue another show would be good for others who didn't get tickets right away.
Landing the show was already going to be a good selling point for future concerts but having 2 U2 concerts would be Fing amazing. It'll make up for losing Elton John.
I have been wondering if this was a posibility. After looking at their tour schedual for other locations MANY of the locations have two shows on back to back nights. It also looks like, but I am not sure, that they were not anounced at the same time. I gather this from some of the old press releases I found on line announcing a U2 show with one date and then there is two on the schedual as you look now.
Thats encouraging. I wonder how they could swing that though. Because if I'm not mistaken, they are playing in Omaha on a Thursday night and Salt Lake City on Saturday. The band could fly out there with no problem but I would think they would need all day Friday to get the gear out there and set up again.