Hi Tom, Becca, everyone,
I *think* when the fares drop after you have purchased, you can phone
the airline and ask for the lower fare.
They certainly don't just do it, but James and I have seen the fare drop
and been irritated just like you and for the same reason. We phoned and
asked for the lower fare for our already purchased tickets. We got it.
It never hurts to ask - the worst that can happen is they will say no.
You have nothing to lose, but money to save if you are successful. Give it a try.