Called on Monday to add to my day by day for BWV std view 1BR-- reservation for 11 months from now---Aug 5, 6 7..to go with Aug 1-4 made last week...fine--it was done...called today to add Aug 8 and 9---and MS says- all they have are Aug 1-4..no record of my call Monday for 5-6-7--and since it is all one linked reservation--I have only the original confirmation number from the first few days which proves nothing...luckily there was still plenty of inventory--but what if this was a more difficult time-- like Xmas? What if my middle dates were never entered because MS messed up? I share this only as a warning to be very careful with day by day reservations....My only advice is to write down the name of whomever you talk to in these circumstances and the time of the call--not sure it will really help, but the more info that you have- the more likely you will have a chance at a satisfactory solution, I would think. Has this ever happened to anyone else???