I wonder if the powers that be (record company) thought ISHST too rocking? Love Me Do is a very inoffensive song for ears unused to rock'n'roll. If you check out chart toppers of that year you see why. Beatles was the most rocking act around. I mean, this was the year when artists like Dean Martin, Roy Orbison and The Supremes topped the charts and Animals had a hit with House of the Rising Sun. Mostly ballads. Tame stuff.