As of 2014-06-29, this bug still has not been fixed. I am reporting it to Adobe, though I doubt that it will be a high priority for them (Sigh!).
If others are seeing this, it would be useful to know the details. I suspect, given that I have seen a similar bug in another program that I use, and given that this bug appears to be present in Mac but not Windows, that this is due to a bug in Apple's code. But that is only as suspicion.
I am seeing this bug with Lightroom 5.5 running Mac OS Mavericks 10.9.3. I have reported it at Bug report: Lightroom changes creation date of image files.