Melodisc WAS NOT a subsidiary of Oriole. Melodisc (whose subsidiary was Blue Beat) was an entirely separate, competing company, owned by Emil Shallit. It continued at least well into the ’70s, long after Oriole was absorbed by CBS.
In his 2009 autobiography “Sex & Violins”, Oriole producer John Schroeder quotes a March 1962 news item from the New Musical Express that briefly mentions the Gary Edwards Combo’s “The Method” and “Franz Liszt Twist”, suggesting that those were the A sides. Schroeder’s book has nearly 40 pages discussing the three years or so that he spent with Oriole in the early 1960s – very informative.