I'm also seeing weirdness with the new IR Player block as far as how it displays in Axe-Edit, but I think all this will be addressed with the new Axe-Edit version. The new IR Player looks really cool through the front panel. Loading a second IR Player block in Axe-Edit made it display even weirder, since it no longer exists haha.
If you wanted to switch between two amps, each going into it's own IR in the new IR Player, since there is only one instance available, I'm guessing the way to do it is to send each amp out hard panned L & R respectively, stereo input on the IR Player, Parallel Mode, then send the signal to a mixer block to make mono?