My uneducated guess would be that you are not correct. If a big group of appointments are coming this week and that email went to everyone it seems that statistically more people would have posted that they received the erroneous email.
I have thought about the potential of a big group of appointments that may or may not occur between the 11th & 13th as others have speculated. If it does occur this week and you are not in the group, I think that chances of appointment start to decrease. It's not impossible and its never over until the TWE but sadly I suspect chances do begin to diminish. If the wave occurs and DS is not in the group, our family is going to accelerate the visits to other colleges to try to soften the blow. Maybe in the end it does work out but just in case we want to start "hedging our bets".