Master slide buttons not showing on all sub slides

Now I know what I am looking at. I don't understand what you mean by 'I know the Master Slide Objects on Top is NOT checked because if I do the text goes away per the next screen'. 

My bad, should have insisted to see the Timeline everywhere. How you define the background in the Master slides is not clear to me.  Is the light blue color of the Main master slide the Fill of that master slide, or is that a blue shape on top of the background? Better to use a Fill Solid color.

Since you probably created a shape for the dark blue color on the daughter master slide, it will cover up the buttons from the main master slide. Two ways to avoid that: do not use buttons on the Main master slide or replace the individual shapes (dark blue) by filling the daughter master slide with a gradient:

The screenshot was for a gradient which is not perfect. I wonder when we will be able to import a gradient (using CC Libraries) from Photoshop or Illustrator where the creation is much easier.

I see that you have several master slide with alternating colors. I really would prefer in that case to use buttons on each daughter master slide, instead of on the Main master slide, if you cannot keep the area for the buttons empty on the daughter master slides. After all you don't need a back button on the first slide, nor a Next button on the last slide.