No, @Anothermi, you're right. Next week is the traditional Meet the Top 20 showcase, where they all dance in their own styles. It's just that b/c there are less episodes this year, we're voting after it, which necessatated the dancers dancing in pairs, rather than groups of random size that we're used to. In fact, I'm highly suspicious that having to do this for the showcase influenced the number of dancers of each style they chose. It just seems a little convenient that it worked out to even numbers in every single genre.
Basically, it's just a regular Meet the Top 20 show, with pairs instead of groups & voting thrown into the mix. And the results will be used on the following week Top 20 show. (Meaning there won't be 2 top 20 shows this season.)
After next week, it goes back to the traditional "random" boy-girl pairs given "random" styles, that we've all come to know & love.
(In those videos, some people were paired with their partner for next week & others weren't, so I can see how it might be confusing.)