Yes, unfortunately this is 100% correct. I found numerous references to scams like this one. A very expensive lesson which I will never forget.
Obviously I won't do the 2nd send.
Good thing you found out it is a scam before sending the scammers another of your money. Yeah, it is an expensive lesson, but one you have learnt and you probably would not fall for again. A few days ago some people also learnt their own lesson when French footballer Kylian Mbappe's X account was hacked, and the scammer promoted a scam token and so many people bought it and lost money to it, i don't know why people believe things like these and end up falling victim to it.