I didn't realize that re-timestamped comments. That's a pretty unexpected behavior, if true. I wouldn't like if that happened to a comment I left - a lot can happen in a week.
Every time it happens there's a sub-thread asking about the weird timestamps and dang replies to it saying changing the timestamps is done so that there won't be a sub-thread about the weird timestamps.
True. I don't understand why they overwrite the date at all actually, for either the post or the comments, that sounds like the hackiest way of implementing the “second chance pool” feature.