I can not understand " buy/sell" prices on USDT p2p vs "buy/sell" for USD in casual exchange point

Good day, I've simply observed one factor and received confused. " Buy/ sell" is like swapped on p2p

If individual go to change level to get USD , supplier sells USD by " sell " worth ( individual purchase by sell worth) , and individual may give his USD to supplier by " buy " worth . Logically " promote worth " is larger

On p2p : individual purchase USDT from different users by " purchase" worth ( not " promote") and individual sell USDT with "promote " worth.

Right here "promote" worth is decrease, "purchase " larger

On photograph you'll be able to see

Thanks, when you can clarify it.