Are there sunnah prayers before Asr and Isha?

I read Hadith sunnah prayers are : 2 before fajr 4 before zuhr 2 after 2 after Maghrib 2 after Isha But I was taught those and **also 4 rakat before asr and Isha and when I go to the mosque at those times people do this too.** which I assumed were sunnah and I have been praying them with the sunnah intention What to do? I’m confused