Embassy Television was founded before the 1982-83 season, reincorporated from Tandem Productions and the T.A.T. Communcations Company. Diff'rent Strokes used the "A Tandem Production" in-end-credit notice for Seasons 1 - 7, even after Embassy TV was founded, and the sitcom did not use the Embassy TV "Spinning/Rolling ☆E" logo until Season 8, after it moved to ABC from NBC. What was the reason for the Tandem Productions credit continuing to appear on the end credits of DS even after Embassy TV was launched?