I don't fly regularly, and I'm not experienced at bargain hunting with respect to air travel. I'm not really sure what I'm looking at, but I'm thinking this means you bought four trips, sorted by date like this:
A : 11/20 : SFO - MHT
B : 11/25 : PVD - SFO
C : 12/20 : SFO - PVD
D : 12/30 : BOS - SFO
And you bought these in round-trip pairs, AD was one pair and BC was another pair. Which might be cheaper than buying AB and CD, depending on what's available, especially if the tickets are from different airlines.
Shouldn't those sites that compare a bunch of airlines have software that figures this out for you automatically?
A : 11/20 : SFO - MHT
B : 11/25 : PVD - SFO
C : 12/20 : SFO - PVD
D : 12/30 : BOS - SFO
And you bought these in round-trip pairs, AD was one pair and BC was another pair. Which might be cheaper than buying AB and CD, depending on what's available, especially if the tickets are from different airlines.
Shouldn't those sites that compare a bunch of airlines have software that figures this out for you automatically?