Player posts blind before previous pot is scooped

[zepthiir]

Well given the fact that the pot wasnt brought in there was no clear distinction between the pot and his blinds.

I understand it is the dealer's fault but trying to explain to the people at the table that they should do this when they are dealer just falls on deaf ears.

I have no idea if he put the blind in or not, I certainly didnt see him put the chips in and have no idea if anyone else did which is why I am wondering what the correct thing to do here is.