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.