[whpalmer4]

It sounds like you are doing it wrong. Tap the Edit button; handles will appear at the right end of the rows. Drag actions hither and yon. Tap Done when (wait for it) done. Worth noting: you cannot drag an unnested action to be the last action in a nested grouping, so if that's where you want it, drag it to the penultimate spot first, then drag the last action forward one slot. To do the initial nesting of one action under another, you still have to use the popup editor and the Move button.