Not to repeat myself, we’ve just recently had quite a discussion on this topic here, where in the topic you can find all the answers and tips about this too.
In short: Listening practices from Challenge 10 on are meant to be as quick as they are because they’re not aimed for learners to understand what’s said in the first place but just purely to get used to the speach and force your brains with it to faster reactions in time what will help you when you come into the wild conversing to someone where you can not know what to expect and how fast the speach would be.
So, all is norman. In time you’ll find yourself to understand more and more without not even listening that carefully anymore.
Hwyl!
Tatjana 