It's definitely one of my favourite sentences in this course, it never fails to make me smile :)
And I love the fact that both Irish and Scottish Gaelic courses on Duo are based on human voice recordings, rather than computer-generated speech. There are many sentences in which those voices manage to convey authentic human emotions, which really helps me to understand the meaning of what is being said (even before translating it to English), and to remember whole phrases with very specific melody, rythm and feeling. And that, in turn, helps me to construct my own similar sentences later on.
In my opinion, human voices truly breathe LIFE into those languages here, (I wish all my language courses on Duo were presented like that) and it makes all the difference while learning, at least for me. It activates both the intellectual and the emotional part of my brain, and that really helps the new information to sink in.
Practice. In real life, you'd know whether it was one thing or multiple things under discussion, and your brain would "fix" the sound that you hear so that it made logical sense, and the problem wouldn't arise. You do it all the time with the language that you hear around you, but you aren't familiar enough with Irish to do that yet. (And listening to repeated recordings of a single speaker isn't actually the best way to get that practice, but it is better than nothing). You should take some time to watch some shows on TG4 or listen to some radio from RnaG or some of the other Irish language radio stations.