I noticed you finally registered an account. Congratulations. Would you like us to merge all of your old accounts into this one? – Robert Harvey♦
Yes, please merge all my currently existing accounts. Thank you! – mat
Some time ago I wrote here the same request. At that time there was neither a confirmation nor a rejection by user mat about what to do with the accounts. Now things are hopefully clear enough.
There are about 50 orphaned accounts present. The earliest probably being 350449. See my deleted question for the other accounts.