Multiple Conditions not Working

Hello,

I'm trying to create conditions to disable the built-in Next button until 2 things occur:  The audio for the slide completes AND my "interactionComplete" variable is satisfied.  My results are very inconsistent - at best.

Here's my setup:

As my audio narration is playing and I have 3 buttons on screen, each button will take the viewer to a separate layer once clicked.  When the timeline for each layer begins, "1" is added to the variable "interactionComplete".  I will then add the condition that the Next button should be enabled once "interactionComplete" is greater than or equal to "3" (since they might click each button more than once) AND the timeline for the main layer ends (this is where my audio resides).

Storyline appears to recognize only the first condition in my function.  If I say: Enable Next when timeline ends it will do that but disregard if the buttons were clicked or not.  If I reverse the order and say: Enable Next when the 3 buttons are clicked, the Next button is enabled if they click all 3 quickly and disregards if the audio is completed (main timeline ends) or not. 

Also, when previewing, there have been several instances where everything works fine but once published and viewed from the web things no longer work properly like they did while in preview.  So how can I fix something while editing if preview mode tells me everything is working??

Any suggestions???