Have you bought bitcoin before in Binance? There's a possibility that the reason why you're paying so much for 1 bitcoin is probably because of the transaction fees or something, that's the only explanation that I can think of as to why they charge that much. You can put a customer support question if you want answer directly from them.
Is even funny how they show $26K on the front page of the site when you are logout:
https://i.imgur.com/iFdYRzD.pngWhen I login, the price is $2K more than the current BTC price $44K
All this is via the web site, not the app, the iOS app is not available in my country, only Binance.US not work in my country.
It's probably something got to do with their UI/UX design, that's the only way that I can think why they're having that problem, maybe they haven't updated it yet. Did it affect your trading or something? If it didn't then you can just brush it off or report it to the Binance support, they might be able to help you. Since it's probably the website then, it's probably as I've suspected.