Have seen this off centering often. Layout errors are often "exact" errors, off by one foot etc. OTOH, code calls for three inches bearing on masonry for wood structure. So this does "pass", no matter how sloppy it looks. Piers are supposed to be capped, like Marc said, or the top voids grouted to make a solid cap. Here lots of builders use treated pine for caps, and they appear to work OK. I see no problem with rotation.