[Solved] Menus advancing/returning several at a time

edit: Kudos to my man perchik for getting me out of it with style.

Here's my code. It's bloated and horrible -- my attempt at a generic piece of code for all menus didn't pan out -- but that's not really the problem. (Though I'll gladly have a tip or two on the side.)

         if (options) {
             if (optionsSelected == 3) {    
                 if (Input.GetKeyDown (controller.p1ButtonA) | Input.GetKeyDown (controller.p2ButtonA)) {
                     options = false;
                     sound = true;
                     }
             }
         }

         if (sound) {
             if (audioSelected == 4) {
                 if ((Input.GetKeyDown (controller.p1ButtonA) | Input.GetKeyDown (controller.p2ButtonA))) {
                     options = true;
                     sound = false;
                 }
             }
         }

In short, there's meant to be a "Back" item in the audio menu.

I think I get what happens -- the forward and back commands are both run in the same frame, and because I have a separate selector for each submenu (believe me, I tried), the "Back" item is triggered on the same keypress immediately after the audio menu is entered. The thing I can't figure out is how to set up my input so as to avoid this sort of keypress confusion.

edit: Well, I've tried a special coroutine for preventing double inputs...

     IEnumerator DoubleInputPrevention() {
         noPress = true;
         yield return new WaitForSeconds (0.25f);
         noPress = false;
     }

...and now the opposite happens -- the menu is never entered, because noPress is already true by the time the code gets to the relevant block.

I'm out of ideas.