ui12 - Order of inputs on main mix screen?

I used to have my inputs in a custom order on the main mix screen (instead of 1 thru 8, i believe I sorted them as 1, 5, 2, 6, 3, 7, 4, 8). But that order is now gone, and I can't get it back...I also cannot use the "sort" button in the custom views. I tap it, it illuminates, but only while I touch it; like a momentary switch. It goes off immediately, and I can't seem to figure out how to put my inputs into a custom order on the main mix screen again.

I'm using a ui12 with an iPad Mini 4 (though the same issue exists no matter what device I use for access). All are updated to latest firmware.

UPDATE: I figured it out. Just reset the view, and tap the inputs in the order you want them displayed. A little non-intuitive, which is probably why I couldn't remember how to do it. I'd delete this post, but can't find how to do that either? Only edit? Ha. Cheers, everyone.