Yes, the audio is wrong. It's an okayish pronunciation of a heteronym (Personal Computer). Duolingo staff are aware of this problem, but there's nothing they can about it at the moment. There's no need to report this anymore. Here's what it should sound like:
Thank you! Now I found it. "Aussprache" is the word that helped me find the speaker symbol!. I must have scrolled by too fast the first time. Thank you, again!
If Personal is personnel then what is the word for the adjective personal in German?
Persönlich. It's an adjective meaning "personal" and an adverb meaning "personally".