oh yeah, mine has flipped between dates and week ranges probably 6-8 times throughout the process, however a few folks in my area have reported they reverted from date ranges to X weeks and within 24hrs or so of that happening they received VINs. Most every other time I have seen the same changes as others, either getting a date range or X weeks as they changed for everyone else. However, this time, I did not revert to X weeks when they did, and I do not yet have my VIN. Not sure if its just "noise" or if something more along the lines of production milestones throwing off the algorithm and if it is unable to compute a date it reverts to X weeks.