How mad is this?

If you ask for the price of a ticket from LHR to MIA on 24 Feb in economy (and only search on that day - set days -/+ to 0) - you get a ticket price of £159.

If you ask it too look 14 days either side - it shows a price of £118 for the 24 Feb.

Are they trying to squeeze an extra few quid out you if they think your tied to one date?