Is it really necessary to receive 3 emails in a 5 day period telling me "You've been upgraded!" for the same flight? I appreciate the first one, which I signed up for. The second one, I generally ignore, but I just got the 3rd one a few minutes ago- for my flight that leaves in 45 minutes... telling me I've been upgraded to the seat I have had for 5 days- the same seat that I have held a boarding pass for for 24 hours.

Anyone else have this happen? Could it be triggered by an equipment change? It only seems to happen when I'm on a DC-9, not the CRJ-9.