I have just attempted to give away a whole bunch of NC items using gift boxes. But now my inbox is full of messages saying that [my username] has sent me [gift I tried to send to a different user].  

Is this a bug or were all the gifts immediately returned by the other users? Why does TNT think I've sent myself all these gifts?

It could be what you sent, specifically. Some things give you an item as well as the person you send it to, 

It happened with basically every item I sent - it seems odd to me that the random collection of NC wearables I was giving away all have that feature.

Also - if thats the case, is it normal that it happened as soon as I sent the items? 

I feel like there was some error with the usernames of the people I was tying to send the items to and Neopets for some reason substituted my own username.

 

Ok - I just tired again.

On the pop-up window for the NC gift box, on the page where you have to enter your password it has the username of the person I actually wanted to send the item to. But I click submit and the next screen says "Congratulations your gift has been delivered to [my username]". So the other person is just not getting it and I've wasted all my gift boxes before realising this had happened.