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

Howdy, I've simply observed one factor and acquired confused. " Purchase/ sell" is like swapped on p2p

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

On p2p : individual buy USDT from other customers by " purchase" worth ( not " promote") and individual sell USDT with "promote " worth.

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

On photograph you'll be able to see

Thanks, should you can explain it.