Multiple buttons are auto-advancing the slide

I am using Captivate 8, and I've essentially disabled the auto-advance by having buttons on each slide that advance to the next slide when clicked.

It gets problematic, however, when there are multiple buttons on the slide.  Clicking another button that shows hidden content unpauses the slide and automatically advances the slide by itself.

For example:

Button A - Advance to next slide

Button B - Show text box XYZ.

When the user clicks button B, the slide advances, even if button A was never clicked.

Is there something I'm missing that I need to do to keep this from happening?

Thanks in advance.