I've added additional information regarding my stolen account in this thread, including the PM's the person using my "Delicieuxz" account has sent to me:
https://bitcointalksearch.org/topic/m.27212813
Particularly in this post: https://bitcointalksearch.org/topic/m.27214053
I more and more think that there are people selling accounts and try to get them back to sell them again.
But why would they do that? I would think that an account would be tainted once it's been reported stolen once. If it happened again with the same account, it would all be on record, and there would be major red flags.
My account was never stolen before this time, and this is the only time I've ever reported my account as compromised.
Also, if the person who bought a hacked account suspected that what you said is true, then they would retaliate by exposing the person they bought the account from.
Further, the site admins and moderators can see that the IP addressed used for my "Delicieuxz" account, from 2012 until May 2017, should be the same, although if it's changed, then it should still show the world location as the same. However, the posts made from September 2017 onward will show a very different IP address location - I'm guessing from the other side of the world as me and as the IP address for all earlier posts from my account.
And the IP address that will be shown with my "Delicieuxz 2" posts should be the same as the IP address for my two "Delicieuxz" posts from May 2017.
So, at least in the this case, it should all be easy to piece together the situation.
It would be interesting who he bought this account from.
If admins can check which accounts share the same IP as the one the person using my "Delicieuxz" account is associated with, they could locate the account which he used for the transaction, and then see who sold him my account by checking his PM history. I read another post by a moderator that says that site admins can recover any deleted messages, so the record should be there.