mobile horizontal view

Hello friendly Captivate Forum users -

I have a question that is perplexing me.  I created a responsive etraining in Cp8 with closed captions.  When I view the etraining on a 9.7" iPad in the vertical view, the length of the etraining is correct according to the breakpoints in Cp8.

When I view this etraining in horizontal view I view the entire screen, just like I was viewing it on a desktop.

Why is this?  Honestly, I'm happy about this because I prefer to have users view the entire page instead of the tablet breakpoint I set in Cp8.  Is this a fluke; did I set it up this way (without realizing it); or is this standard operating procedure for Cp8?

I noticed something else.  When I view the etraining in the vertical view, the closed captions work correctly.  When I view the etraing in horizontal view, the closed captions do not work.  Does anyone know why this is?

Ideally I want the viewers to use this etraining in the horizontal view with closed captions available.

Any insight on either of these matters would be much appreciated!

Thank you