At the risk of sounding pedantic I think this is another case of assuming the lower matrix is the A side. With Mercury that ain't always so because matrices were assigned at time of recording or acquisition. "Seven Lonely Days" was always intended to be the biggie here. Actually I remember this one being hammered on the wireless when I was still a wee tacker waiting for rock & roll to come along. There were a lot of versions out there and it was a sizeable worldwide hit song.