Grinder Helmets for everyone?

[fluffiluffigus]

I was playing earlier today and according to Nordinvasion i found 5 grinder helmets while playing hardmode mountain pass. so i went to the website to check my inventory and i didnt have any. i took a screenshot of me getting 2 helmets pretty much back to back. there was also some other people saying they experienced the same thing so i dont know if it was an issue with hardmode, or the server itself.  https://i.imgur.com/zwSZz.jpg