[mothered]

No idea.

As per this:

1. Buying the Logitech stuff you want on your local shop.

If you were the original buyer, I don't understand how It can be registered to someone else.

Serial number generators and things of that nature have exhausted 90percent of all Logitech headsets is what I think, so most of the time a legit headset you have, the S/N on that headset has already been used. Just my thoughts though. What do you think?

It may well be the case, but given you're the original buyer, Logitech have a responsibility to ensure that their customers get what they've paid for.

If there are Inconsistencies, that's their problem not yours.