Left at sixes and sevens: i.e. in confusion; commonly said of a room where the furniture, &c. is scattered about; or of a business left unsettled.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Six and Tips * Size of AleNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes