Thanks OP for bringing this topic, I recently made a p2p transaction where the buyer was supposed to pay me a certain amount in naira, let’s say N562,000 and instead he sent N56,200 to my account. I wasn’t sure if it was planned or an error on his part, so I contacted him. He later made a balance payment through another bank account. This made me very suspicious, I believe this is a tactic scammers now use to trick OTC traders, they send an amount that looks like what they are suppose to pay, and tell the seller they have paid. Close inspection will show that the figures do not match, like OP said “don’t let the pressure get to you”, make sure you have the agreed amount in your account before releasing the coins.
I think that's there new pattern or rather strategy of scamming people by trick, a friend of mine had similar case as you during p2p trading also, he sold a dollar worth of N45600 and the buyer transferred N4560 and clicking paid asking and pressuring the guy to release the funds and he almost released the money if not that he decided to check very well if the amount is completed before he would release the money that's how he would have been scammed, so we should be very careful especially when dealing with p2p because there are people who there work are to scam people of there money true that method, that's why the exchange normally advise to check very well before releasing your money.