Ohh, I have seen that now. That was a spillover that I didn't get to remove, it is a new website so some development functions might be lying around.
The reason why that was added initially was because during development I wanted to erase the need to login and post with posting key by having an account that has posting authority so the key to that account would be the only required key while submitting a post. However I didn't get to use that approach and just simply forgot to remove that function(my test accounts have already granted the accounts posting auth so I simply don't see them anymore while logging in, that's probably the reason for the oversight). I am going to do an emergency update fixing that in a few hours.
Thanks for the feedback