Too bad Captioning is horribly broken on the Windows 8.1 RT Netflix client. It appears as though captions that are very close together just get dropped; if I rewind the correct amount, the caption will then display.
I encountered this watching subtitled shows, but tested out captioning and it appears to use the same broken system.
You want to know that they're appearing at the right time, and are fully displayed.
> Also if they can reliably show the real captions at the top, why would they need to test the captions at the bottom? :s
Never trust something like this. Maybe you're generating them reliably but the TV is applying overscan and your captions aren't actually visible. Or maybe you've set the resolution too large and the way the TV deals with that is to cut the bottom of the screen off. Or you've just messed up the calculation of positions and put it off screen.