Is Our Way of Praying Sunnah Correct? Help a Confused Soul!

Assalamu alaykum everyone, I'm really confused about something. Growing up Turkish, I was taught that for each prayer, we have sunnah rakats like this: Fajr 2 sunnah then 2 fard; Dhuhr 4 sunnah then 4 fard; Asr 4 sunnah then 4 fard; Maghrib 3 fard then 2 sunnah; Isha 4 sunnah then 4 fard then 2 sunnah. But then I heard a sheikh on YouTube saying the sunnah is only 12 rakats spread through the day, something like: 2 before Fajr, 2 before and 2 after Dhuhr, 2 after Maghrib, 2 after Isha. So are we Turks doing too much? Is more better, or are we wrong? I tried asking our local scholars and they say 'Arabs do it that way, but you should stick to our tradition and not follow others.' When I mention that the sunnah might actually be what the sheikh said, they tell me I'm going astray. I've done a lot of reading and now I feel maybe we're doing something wrong, or maybe it's just different but still okay? I really want to find the right way. Please help me understand, what is correct? Jazakum Allahu khairan.