Wiktionary
at sixes and sevens
prep.phr. 1 (context idiomatic English) In a state of confusion. 2 (context idiomatic of people or groups English) In a state of dispute or disagreement.
Wikipedia
At Sixes and Sevens
At Sixes and Sevens is the debut studio album by the Norwegian gothic metal band Sirenia, and their only album featuring the vocals of French singer Fabienne Gondamin. The woman on the cover is a Norwegian model, picked by the designer to represent a Siren.