Proper deck girder placement on piers.

To me this is a disaster getting ready to happen…
They should be centered on the piers.
What do you think?
I don’t like the girder whole setup.

Doesn’t look right, was there a mechanical connection?

Not to the pier.

Would it be ok if there was just a 4x4 under it? I don’t see a problem other than not being secured.

I agree, the column is not loaded uniformly. I would recommend further evaluation by a structural engineer.