I believe both of these live version (ABOY and COBL) relied a lot on play-back and sequencing, more than usual, probably because they haven't fully rehearsed the songs yet.
There is definately acoustic guitar in ABOY, and of course Edge can't be playing both, so if Bono was not playing, it was definately pre-recorded. But I wouldn't be surprised if Bono ends up playing that part eventually.
The fact that they changed the order of the songs makes no difference, with play-back and sequencing, you can control pre-recorded instruments almost like you were playing them live, and Edge would be able to do it all with his foot-pedals.
Btw, U2 does rely quite a bit on sequencing and play-back when they play live, there are often many layers of sound that are clearly not coming from any of the instruments on stage. And there is nothing wrong with that, they are a four piece band, and if they want to have a full sound without adding a musician (which many other artists do), they need to rely on technology to a certain extent.