Most likely it's a bug that somehow skews the random seed. Beyond that - no idea. I'm still saving money for a new computer and a CX simply isn't in the budget, so chances are slim that I will ever be useful in these matters. ;-) Just make sure to file it on the official bug report form: http://www.adobe.com/go/wish. Otherwise, as a joint venture product, the CX certainly comes with some kind of extended support on Adobe's end, so a call to support might provide some help (after the 5th of January).