For those wondering, yes, the dialogue from Sae's brother directly contradicts what's written on the white board. That's not a translation mistake Reon's surname 安渡 can be read both as "Ando" and "Yasuwatari". It wasn't audibly said in the episode so we decided to go with Ando for now. We're not following the official as-is because even they have been known to get names wrong before (Translating the school name as "Amazakura" instead of "Tennou/Tenoh"