Make sense.

Even "OG" asked for the shipping ID to the scammer, fake ID shipping can be sent and "OG" will release the fund anyway. Since the deal, was not included a check confirmation while the buyer received the package while he opened the package as well.

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For @OP, my speculation is your account is getting targeted hacked while you're discussing with him. You can get "redirect phising site", the scammer send you message with "bitcointalk message" and redirect you to a phising site.You put account information on the phising site, is gonna tell you a wrong information but after phishing site will redirect you to the real one. So, once you put again is gonna to be success and he got your account information.

To be honest, to make a different "I was visiting the phising site" I using "Login forever". Once, you opened bitcointalk but with condition your account is not login then should aware more could be visiting a phising site.